material safety data sheet

NFPA RATING

FLAMMABILITY

NFPA RATING

FLAMMABILITY

MATERIAL SAFETY DATA

SHEET

Prepared to U.S. OSHA, CMA, ANSI and Canadian WHMIS

Standards

HEALTH

0

4

0

REACTIVITY HEALTH

3

4

OTHER OTHER

PART I

What is the material and what do I need to know in an emergency?

CHEMICAL NAME; CLASS:

1. PRODUCT IDENTIFICATION

PRODUCT USE:

SUPPLIER/MANUFACTURER'S NAME:

HYDROGEN - H

2

LIQUEFIED HYDROGEN- H

Number:

2

001026

(Cryogenic)

For general analytical/synthetic chemical uses.

AIRGAS INC.

0

REACTIVITY

DATE OF REVISION:

2. COMPOSITION and INFORMATION ON INGREDIENTS

CHEMICAL NAME CAS # mole % EXPOSURE LIMITS IN AIR

Hydrogen 1333-74-0 99.99% There are no specific exposure limits for Hydrogen. Hydrogen is a simple asphyxiant

(SA). Oxygen levels should be maintained above 19.5%.

Maximum Impurities < 1%

(100 ppm)

None of the trace impurities of this gas contribute significantly to the hazards associated with the product. All hazard information pertinent to this product has been provided in this Material Safety Data Sheet, per the requirements of the Federal Occupational Safety and Health Administration Standard (29 CFR 1910.1200), U.S. State equivalent

Standards and Canadian Workplace Hazardous Materials Identification System

Standards (CPR 4).

NE = Not Established. See Section 16 for Definitions of Terms Used.

NOTE (1): ALL WHMIS required information is included in appropriate sections based on the ANSI Z400.1-1998 format. This gas has been classified in accordance with the hazard criteria of the CPR and the MSDS contains all the information required by the CPR.

HYDROGEN - H

2

MSDS (Document #001026)

3. HAZARD IDENTIFICATION

EMERGENCY OVERVIEW: Hydrogen is a colorless, odorless, flammable gas or a colorless, odorless, cryogenic

liquid. The main health hazard associated with releases of this gas is asphyxiation, by displacement of oxygen.

The liquefied gas can cause frostbite to any contaminated tissue. Hydrogen poses a serious fire hazard when it is accidentally released. Flame or high temperature impinging on a localized area of the cylinder of Hydrogen can cause the cylinder to rupture without activating the cylinder’s relief devices. Provide adequate fire protection during emergency response situations.

HYDROGEN GAS

LIQUID HYDROGEN

HAZARDOUS MATERIAL IDENTIFICATION SYSTEM HAZARDOUS MATERIAL IDENTIFICATION SYSTEM

HEALTH HAZARD

(BLUE)

0

HEALTH HAZARD

(BLUE)

3

FLAMMABILITY HAZARD

(RED)

4

FLAMMABILITY HAZARD

(RED) 4

PHYSICAL HAZARD

(YELLOW)

0

PHYSICAL HAZARD

(YELLOW)

0

PROTECTIVE EQUIPMENT

B

PROTECTIVE EQUIPMENT

X

EYES

RESPIRATORY

HANDS BODY EYES

RESPIRATORY

HANDS BODY

See

Section 8

See

Section 8

For Routine Industrial Use and Handling Applications

See

Section 8

See

Section 8

For Routine Industrial Use and Handling Applications

See Section 16 for Definition of Ratings

SYMPTOMS OF OVEREXPOSURE BY ROUTE OF EXPOSURE: The most significant route of overexposure for this gas is by inhalation. The following paragraphs describe symptoms of exposure by route of exposure.

INHALATION: High concentrations of this gas can cause an oxygen-deficient environment. Individuals breathing such an atmosphere may experience symptoms which include headaches, ringing in ears, dizziness, drowsiness, unconsciousness, nausea, vomiting, and depression of all the senses. Under some circumstances of overexposure, death may occur. The following effects associated with various levels of oxygen are as follows:

CONCENTRATION

12-16% Oxygen:

10-14% Oxygen:

6-10% Oxygen:

Below 6%:

SYMPTOMS OF EXPOSURE

Breathing and pulse rate increased, muscular coordination slightly disturbed.

Emotional upset, abnormal fatigue, disturbed respiration.

Nausea and vomiting, collapse or loss of consciousness.

Convulsive movements, possible respiratory collapse, and death.

In addition, inhalation of very high levels of this gas may result in mild depression of the central nervous system.

Symptoms can include headache, nausea, dizziness, drowsiness, incoordination, and confusion. Symptoms should be relieved upon removal to fresh air.

OTHER POTENTIAL HEALTH EFFECTS: Contact with cryogenic liquid or rapidly expanding gases (which are released under high pressure) may cause frostbite. Symptoms of frostbite include change in skin color to white or grayish-yellow. The pain after contact with liquid can quickly subside.

HYDROGEN - H

2

MSDS (Document #001026)

3. HAZARD IDENTIFICATION (Continued)

HEALTH EFFECTS OR RISKS FROM EXPOSURE: An Explanation in Lay Terms. Overexposure to Hydrogen may cause the following health effects:

ACUTE: The most significant hazard associated with this gas is inhalation of oxygen-deficient atmospheres.

Symptoms of oxygen deficiency includes respiratory difficulty, ringing in ears, headaches, shortness of breath, wheezing, headache, dizziness, indigestion, nausea, and, at high concentrations, unconsciousness or death may occur. The skin of a victim of over-exposure may have a blue color. High concentration inhalation exposure can also lead to mild central nervous system depression. Contact with cryogenic liquid or rapidly expanding gases

(which are released under high pressure) may cause frostbite. Symptoms of frostbite include change in skin color to white or grayish-yellow. The pain after contact with liquid can quickly subside.

CHRONIC: Chronic exposure to oxygen-deficient atmospheres (below 18% oxygen in air) may effect the heart and

nervous system.

TARGET ORGANS:

ACUTE: Respiratory system. CHRONIC: Heart, central nervous system.

PART II

What should I do if a hazardous situation occurs?

4. FIRST-AID MEASURES

Remove victim(s) to a safe location. Trained personnel should administer supplemental oxygen and/or cardiopulmonary resuscitation, if necessary. Victim(s) must be taken for medical attention. Rescuers should be taken for medical attention, if necessary. Take copy of label and MSDS to physician or other health professional with victim(s).

In case of frostbite, place the frostbitten part in warm water. DO NOT USE HOT WATER. If warm water is not available, or is impractical to use, wrap the affected parts gently in blankets. Alternatively, if the fingers or hands are frostbitten, place the affected area of the body in the armpit. Encourage victim to gently exercise the affected part while being warmed. Seek immediate medical attention.

MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE: None known.

RECOMMENDATIONS TO PHYSICIANS: Treat symptoms and reduce over-exposure.

5. FIRE-FIGHTING MEASURES

FLASH POINT: Not applicable.

AUTOIGNITION TEMPERATURE: 571

°C (1060°F)

FLAMMABLE LIMITS (in air by volume, %):

Upper

FIRE EXTINGUISHING MATERIALS: Extinguish fires of this gas by shutting-off the source of the gas. Use water spray to cool fire-exposed structures and equipment.

UNUSUAL FIRE AND EXPLOSION HAZARDS: An extreme explosion hazard exists in areas in which the gas has been released, but the material has not yet ignited. Hydrogen burns with an almost invisible blue flame.

HEALTH

HYDROGEN GAS

NFPA RATING

0

FLAMMABILITY

4

0

REACTIVITY

OTHER

DANGER! Fires impinging (direct flame) on the outside surface of

LIQUID HYDROGEN

unprotected pressure storage vessels of Hydrogen can be very dangerous.

Direct flame exposure on the cylinder wall can cause an explosion either by

BLEVE (Boiling Liquid Expanding Vapor Explosion. This is a catastrophic failure of the vessel releasing the contents into a massive fireball and explosion. The resulting fire and explosion can result in severe equipment damage and personnel injury or death over a large area around the vessel.

NFPA RATING

FLAMMABILITY

4

HEALTH

3

0

REACTIVITY

For massive fires in large areas, use unmanned hose holder or monitor nozzles; if this is not possible, withdraw from area and allow fire to burn.

RESPONSE TO FIRE INVOLVING CRYOGEN: Cryogenic liquids can be

particularly dangerous during fires because of their potential to rapidly freeze water. Careless use of water may cause heavy icing. Furthermore, relatively warm water greatly increases the evaporation rate of Hydrogen. If large

OTHER

See Section 16 for

concentrations of Hydrogen gas are present , the water vapor in the surrounding

Definition of Ratings

air will condense, creating a dense fog that may make it difficult to find fire exits or equipment. Liquid Hydrogen, when exposed to the atmosphere, will produce a cloud of ice/fog in the air upon its release. A flammable mixture will exist within the vapor cloud, and it is advisable that personnel keep well outside the area of visible moisture.

Explosion Sensitivity to Mechanical Impact: Not Sensitive.

Explosion Sensitivity to Static Discharge: Static discharge may cause this gas to ignite explosively. Due to low electrical conductivity, this substance can generate electrostatic charges during handling operations.

HYDROGEN - H

2

MSDS (Document #001026)

5. FIRE-FIGHTING MEASURES (Continued)

SPECIAL FIRE-FIGHTING PROCEDURES: Structural fire-fighters must wear Self-Contained Breathing Apparatus and full protective equipment. The best fire-fighting technique may be simply to let the burning gas escape. Stop the leak before extinguishing fire. If the fire is extinguished before the leak is sealed, the still-leaking gas could explosively re-ignite without warning and cause extensive damage, injury, or fatality. In this case, increase ventilation to prevent flammable or explosive mixture formation. Evacuation may be necessary. Refer to the North

American Emergency Response Guidebook (Guide #115) for additional information.

6. ACCIDENTAL RELEASE MEASURES

SPILL AND LEAK RESPONSE: Uncontrolled releases should be responded to by trained personnel using preplanned procedures. Proper protective equipment should be used. In case of a release, clear the affected area and protect people. Adequate fire protection must be provided. Minimum Personal Protective Equipment should be

Level B: fire-retardant protective clothing, mechanically-resistant gloves and Self-Contained Breathing

Apparatus. Use only non-sparking tools and equipment. Locate and seal the source of the leaking gas. Protect

personnel attempting the shut-off with water-spray. Allow the gas, which is lighter than air, to dissipate. Monitor the surrounding area for combustible gas levels and oxygen. Combustible gas concentration must be below 10% of the

LEL (LEL = 4.0%) prior to entry of response personnel. The atmosphere must have at least 19.5 percent oxygen before personnel can be allowed in the area without Self-Contained Breathing Apparatus. Attempt to close the main source valve prior to entering the area. If this does not stop the release (or if it is not possible to reach the valve), allow the gas to release in-place or remove it to a safe area and allow the gas to be released there.

RESPONSE TO CRYOGENIC RELEASE: Clear the affected area and allow the liquid to evaporate and the gas to

dissipate. After the gas is formed, follow the instructions provided in the previous paragraph. If the area must be entered by emergency personnel, SCBA, Kevlar gloves, and appropriate foot and leg protection must be worn.

THIS IS AN EXTREMELY FLAMMABLE GAS. Protection of all personnel and the area must be maintained.

PART III

How can I prevent hazardous situations from occurring?

7. HANDLING and STORAGE

WORK PRACTICES AND HYGIENE PRACTICES: As with all chemicals, avoid getting Hydrogen IN YOU. Do not eat or drink while handling chemicals. Be aware of any signs of dizziness or fatigue; exposures to fatal concentrations of Hydrogen could occur without any significant warning symptoms.

STORAGE AND HANDLING PRACTICES: Cylinders should be stored in dry, well-ventilated areas away from sources of heat. Compressed gases can present significant safety hazards. Store containers away from heavily trafficked areas and emergency exits. Post “No Smoking or Open Flames” signs in storage or use areas. Note:

Liquid Hydrogen must always be handled in air-tight systems specifically designed and installed for liquid Hydrogen, according to the appropriate standards, NFPA-50B, CGA G-5, G-5.3, G-5.4, and the supplier’s internal specifications. Liquid Hydrogen must never be filled into or handled in open top or loosely capped Dewars. An atmospheric concentration of Hydrogen greater than the LEL will immediately be generated near the vicinity of the

Dewar, creating an extreme fire and explosion hazard. This gas is lighter than air and must not be allowed to accumulate in elevated locations.

SPECIAL PRECAUTIONS FOR HANDLING GAS CYLINDERS: Protect cylinders against physical damage. Store in cool, dry, well-ventilated area, away from sources of heat, ignition and direct sunlight. Do not allow area where cylinders are stored to exceed 52

°C (125°F). Isolate from oxidizers such as oxygen, chlorine, or fluorine. Use a check valve or trap in the discharge line to prevent hazardous backflow. Post “No Smoking or Open Flame” signs in storage and use areas. Cylinders should be stored upright and be firmly secured to prevent falling or being knocked over. Cylinders can be stored in the open, but in such cases, should be protected against extremes of weather and from the dampness of the ground to prevent rusting. Never tamper with pressure relief devices in valves and cylinders. Electrical equipment should be non-sparking or explosion proof. The following rules are applicable to situations in which cylinders are being used:

Before Use: Move cylinders with a suitable hand-truck. Do not drag, slide or roll cylinders. Do not drop cylinders or

permit them to strike each other. Secure cylinders firmly. Leave the valve protection cap, if provided, in-place until cylinder is ready for use.

During Use: Use designated CGA fittings and other support equipment. Do not use adapters. Do not heat cylinder

by any means to increase the discharge rate of the product from the cylinder. Use check valve or trap in discharge line to prevent hazardous backflow into the cylinder. Do not use oils or grease on gas-handling fittings or equipment.

After Use: Close main cylinder valve. Replace valve protection cap, if provided. Mark empty cylinders “EMPTY”.

NOTE: Use only DOT or ASME code containers. Earth-ground and bond all lines and equipment associated with

this product. Close valve after each use and when empty. Cylinders must not be recharged except by or with the consent of manufacturer. For additional information refer to the Compressed Gas Association Pamphlet P-1, Safe

Handling of Compressed Gases in Containers. For cryogenic liquids, refer to CGA P-12, Safe Handling of Cryogenic

Liquids and CGA-5, Hydrogen, and NFPA 50B, Standard for Liquefied Hydrogen Systems at Consumer Sites.

Additionally, refer to CGA Bulletin SB-2 “Oxygen Deficient Atmospheres”.

HYDROGEN - H

2

MSDS (Document #001026)

7. HANDLING and STORAGE (Continued)

PROTECTIVE PRACTICES DURING MAINTENANCE OF CONTAMINATED EQUIPMENT: Follow practices indicated in Section 6 (Accidental Release Measures). Make certain application equipment is locked and tagged-out safely. Purge gas handling equipment with inert gas (e.g., nitrogen) before attempting repairs

8. EXPOSURE CONTROLS - PERSONAL PROTECTION

VENTILATION AND ENGINEERING CONTROLS: Use with adequate ventilation to maintain oxygen levels above

19.5% in the workplace. Local exhaust ventilation is preferred, because it prevents Hydrogen dispersion into the work place by eliminating it at its source. If appropriate, install automatic monitoring equipment to detect the level of oxygen and the presence of potentially explosive air-gas mixtures. Monitoring devices should be installed near the ceiling.

RESPIRATORY PROTECTION: Maintain oxygen levels above 19.5% in the workplace. If respiratory protection is needed, use only protection authorized in the U.S. Federal OSHA Standard (29 CFR 1910.134), applicable U.S.

State regulations, or the Canadian CSA Standard Z94.4-93 and applicable standards of Canadian Provinces.

Oxygen levels below 19.5% are considered IDLH by OSHA. In such atmospheres, use of a full-facepiece pressure/demand SCBA or a full facepiece, supplied air respirator with auxiliary self-contained air supply is required under OSHA’s Respiratory Protection Standard (1910.134-1998).

EYE PROTECTION: Splash goggles or safety glasses, for protection from rapidly expanding gases and splashes of liquid Hydrogen. If necessary, refer to U.S. OSHA 29 CFR 1910.133, or Canadian Standards.

HAND PROTECTION: Wear mechanically-resistant gloves when handling cylinders of Hydrogen. Use lowtemperature protective gloves (e.g., Kevlar) when working with containers of Liquid Hydrogen. If necessary, refer to

U.S. OSHA 29 CFR 1910.138 or appropriate Standards of Canada.

BODY PROTECTION: Use body protection appropriate for task. Transfer of large quantities under pressure may require protective equipment appropriate to protect employees from splashes of liquefied product, as well as fire retardant items. If a hazard of injury to the feet exists due to falling objects, rolling objects, where objects may pierce the soles of the feet or where employee’s feet may be exposed to electrical hazards, use foot protection, as described in U.S. OSHA 29 CFR.

9. PHYSICAL and CHEMICAL PROPERTIES

GAS DENSITY 21.1

°C & 1 atm: 0.08342 kg/m

SPECIFIC GRAVITY @ 0

3

(0.00521 lb/ft

°C and 1 atm ( air = 1):

3

) pH: Not applicable.

TRIPLE

SOLUBILITY IN WATER v/v @ 15.6

°C:

EVAPORATION RATE (nBuAc = 1):

ODOR THRESHOLD:

SPECIFIC VOLUME @ 21.1

°C & 1 atm: 192 ft

3

/lb (11.99 m

3

APPEARANCE AND COLOR: Hydrogen is a colorless, odorless gas.

°C (-434.6°F)

POINT(@

WEIGHT: 2.016

°C (-423.0°F)

COEFFICIENT WATER/OIL DISTRIBUTION: Not applicable. MELTING POINT: -259

°C (-434.6°F)

HOW TO DETECT THIS SUBSTANCE (warning properties): There are no unusual warning properties associated with a release of Hydrogen. In terms of leak detection, fittings and joints can be painted with a soap solution to detect leaks, which will be indicated by a bubble formation. NOTE: This gas is lighter than air and must not be allowed to accumulate in elevated locations.

10. STABILITY and REACTIVITY

STABILITY: Stable.

DECOMPOSITION PRODUCTS: Hydrogen. When ignited in the presence of oxygen, water will be produced.

MATERIALS WITH WHICH SUBSTANCE IS INCOMPATIBLE: Strong oxidizers (e.g., chlorine, bromine, oxygen, oxygen difluoride, and nitrogen trifluoride). Oxygen/Hydrogen mixtures can explode on contact with a catalyst such as platinum.

HAZARDOUS POLYMERIZATION: Will not occur.

CONDITIONS TO AVOID: Contact with incompatible materials and exposure to heat, sparks and other sources of ignition. Cylinders exposed to high temperatures or direct flame can rupture or burst.

PART IV

Is there any other useful information about this material?

11. TOXICOLOGICAL INFORMATION

TOXICITY DATA: There are no specific toxicology data for Hydrogen. Hydrogen is a simple asphyxiant, which acts to displace oxygen in the environment.

SUSPECTED CANCER AGENT: Hydrogen is not found on the following lists: FEDERAL OSHA Z LIST, NTP,

CAL/OSHA, IARC, and therefore is not considered to be, nor suspected to be a cancer-causing agent by these agencies.

IRRITANCY OF PRODUCT: Contact with rapidly expanding gases can be irritating to exposed skin and eyes.

SENSITIZATION OF PRODUCT: Hydrogen is not a sensitizer after prolonged or repeated exposure.

HYDROGEN - H

2

MSDS (Document #001026)

11. TOXICOLOGICAL INFORMATION (Continued)

REPRODUCTIVE TOXICITY INFORMATION: Listed below is information concerning the effects of Hydrogen on the human reproductive system.

Mutagenicity: Hydrogen is not expected to cause mutagenic effects in humans.

Embryotoxcity: No embryotoxic effects have been described for Hydrogen.

Teratogenicity: Hydrogen is not expected to cause teratogenic effects in humans.

Reproductive Toxicity: Hydrogen is not expected to cause adverse reproductive effects in humans.

A mutagen is a chemical which causes permanent changes to genetic material (DNA) such that the changes will propagate through generation lines. An embryotoxin is a chemical which causes damage to a developing embryo

(i.e. within the first eight weeks of pregnancy in humans), but the damage does not propagate across generational lines. A teratogen is a chemical which causes damage to a developing fetus, but the damage does not propagate across generational lines. A reproductive toxin is any substance which interferes in any way with the reproductive process.

BIOLOGICAL EXPOSURE INDICES (BEIs): Currently, Biological Exposure Indices (BEIs) are not applicable for

Hydrogen.

12. ECOLOGICAL INFORMATION

ENVIRONMENTAL STABILITY: Hydrogen occurs naturally in the atmosphere. The gas will be dissipated rapidly in well-ventilated areas.

EFFECT OF MATERIAL ON PLANTS or ANIMALS: Any adverse effect on animals would be related to oxygen deficient environments. No adverse effect is anticipated to occur to plant-life, except for frost produced in the presence of rapidly expanding gases.

EFFECT OF CHEMICAL ON AQUATIC LIFE: No evidence is currently available on the effects of Hydrogen on aquatic life.

13. DISPOSAL CONSIDERATIONS

PREPARING WASTES FOR DISPOSAL: Product removed from the cylinder must be disposed of in accordance with appropriate U.S. Federal, State, and local regulations or with regulations of Canada and its Provinces. Return cylinders with residual product to Airgas, Inc. Do not dispose of locally.

14. TRANSPORTATION INFORMATION

THIS GAS IS HAZARDOUS AS DEFINED BY 49 CFR 172.101 BY THE U.S. DEPARTMENT OF

TRANSPORTATION.

Hydrogen Gas:

PROPER SHIPPING NAME: Hydrogen,

Liquid:

refrigerated

HAZARD CLASS NUMBER and DESCRIPTION: 2.1 (Flammable Gas) 2.1 (Flammable Gas)

UN IDENTIFICATION NUMBER:

PACKING GROUP: Applicable Not

DOT LABEL(S) REQUIRED: Class (Flammable

NORTH AMERICAN EMERGENCY RESPONSE GUIDEBOOK NUMBER (2000): 115 (Gas and Liquid)

MARINE POLLUTANT: Hydrogen is not classified by the DOT as a Marine Pollutant (as defined by 49 CFR

172.101, Appendix B).

TRANSPORT CANADA TRANSPORTATION OF DANGEROUS GOODS REGULATIONS: This gas is considered as Dangerous Goods, per regulations of Transport Canada. The use of the above U.S. DOT information from the

U.S. 49 CFR regulations is allowed for shipments that originate in the U.S. For shipments via ground vehicle or rail that originate in Canada, the following information is applicable.

Hydrogen Gas:

Hydrogen,

Liquid:

refrigerated

HAZARD CLASS NUMBER and DESCRIPTION: 2.1 (Flammable Gas) 2.1 (Flammable Gas)

UN IDENTIFICATION NUMBER:

PACKING GROUP:

HAZARD LABEL(S) REQUIRED: Class 2.1 (Flammable Gas) Class 2.1 (Flammable Gas)

EXPLOSIVE LIMIT & LIMITED QUANTITY INDEX:

ERAP INDEX:

Forbidden Forbidden

PASSENGER CARRYING ROAD OR RAIL VEHICLE INDEX: Forbidden Forbidden

MARINE POLLUTANT: Hydrogen is not Marine Pollutants

ADDITIONAL U.S. REGULATIONS:

15. REGULATORY INFORMATION

U.S. SARA REPORTING REQUIREMENTS: Hydrogen is not subject to the reporting requirements of Sections 302,

304 and 313 of Title III of the Superfund Amendments and Reauthorization Act.

HYDROGEN - H

2

MSDS (Document #001026)

15. REGULATORY INFORMATION (Continued)

ADDITIONAL U.S. REGULATIONS (continued):

U.S. SARA THRESHOLD PLANNING QUANTITY: There are no specific Threshold Planning Quantities for

Hydrogen. The default Federal MSDS submission and inventory requirement filing threshold of 10,000 lb (4,540 kg) may apply, per 40 CFR 370.20.

U.S. TSCA INVENTORY STATUS: Hydrogen is listed on the TSCA Inventory.

U.S. CERCLA REPORTABLE QUANTITIES (RQ): Not applicable.

OTHER U.S. FEDERAL REGULATIONS: Hydrogen is subject to the reporting requirements of Section 112(r) of the

Clean Air Act. The Threshold Quantity for this gas is 10,000 lb. Depending on specific operations involving the use of Hydrogen, the regulations of the Process Safety Management of Highly Hazardous Chemicals may be applicable

(29 CFR 1910.119). Under this regulation Hydrogen is not listed in Appendix A, however, any process that involves a flammable gas on-site, in one location, in quantities of 10,000 lb (4,553 kg) or greater is covered under this regulation unless it is used as a fuel.

U.S. STATE REGULATORY INFORMATION: Hydrogen is covered under the following specific State regulations:

Alaska - Designated Toxic and Hazardous

Substances: Hydrogen.

California - Permissible Exposure Limits

for Chemical Contaminants: Hydrogen.

Florida - Substance List: Hydrogen.

Illinois - Toxic Substance List: Hydrogen.

Kansas - Section 302/313 List: None.

Massachusetts - Substance List: Hydrogen.

Michigan - Critical Materials Register: No.

Minnesota - List of Hazardous

Substances: Hydrogen.

Missouri - Employer Information/Toxic

Substance List: Hydrogen.

New Jersey - Right to Know Hazardous

Substance List: Hydrogen.

North Dakota - List of Hazardous

Pennsylvania - Hazardous Substance List:

Hydrogen.

Rhode Island - Hazardous Substance List:

Hydrogen.

Texas - Hazardous Substance List: None.

West Virginia - Hazardous Substance List:

None.

Wisconsin - Toxic and Hazardous

Substances: None.

Chemicals, Reportable Quantities: None.

CALIFORNIA SAFE DRINKING WATER AND TOXIC ENFORCEMENT ACT (PROPOSITION 65): Hydrogen is not on the California Proposition 65 lists.

CGA LABELING:

DANGER:

FLAMMABLE HIGH PRESSURE GAS.

CAN FORM EXPLOSIVE MIXTURES WITH AIR.

MAY IGNITE IF VALVE IS OPENED TO AIR.

BURNS WITH AN INVISIBLE FLAME.

Keep away from heat, flames, and sparks.

Store and use width adequate ventilation.

Do not open valve until connected to utilization equipment.

Use equipment rated for cylinder pressure.

Approach suspected leak area with caution.

Close valve after each use and when empty.

Use in accordance with the Material Safety Data Sheet.

FIRST-AID: IN CASE OF FROSTBITE, obtain immediate medial attention.

DO NOT REMOVE THIS PRODUCT LABEL.

CGA LABELING (for Liquid):

WARNING:

EXTREMELY COLD FLAMMABLE LIQUID AND GAS UNDER PRESSURE.

CAN FORM EXPLOSIVE MIXTURES WITH AIR.

CAN CAUSE SEVERE FROSTBITE.

BURNS WITH AN INVISIBLE FLAME.

LIQUID OR COLD GAS CAN FREEZE AIR IN VENT LINES.

ALWAYS KEEP CONTAINER IN UPRIGHT POSITION.

Keep away from heat, flames, and sparks.

Store and use with adequate ventilation.

Do not get liquid in eyes, on skin, or clothing.

For liquid withdrawal, wear face shield and gloves.

Approach suspected leak area with caution.

Do not drop. Use hand truck for container movement.

See container manufacturer’s operating instructions to avoid freezing air in vent lines.

Close valve after each use and when empty.

Use in accordance with the Material Safety Data Sheet.

FIRST-AID: IN CASE OF FROSTBITE, obtain immediate medial attention.

DO NOT REMOVE THIS PRODUCT LABEL.

HYDROGEN - H

2

MSDS (Document #001026)

15. REGULATORY INFORMATION (Continued)

ADDITIONAL CANADIAN REGULATIONS:

CANADIAN DSL/NDSL INVENTORY STATUS: Hydrogen is listed on the DSL Inventory.

CANADIAN ENVIRONMENTAL PROTECTION ACT (CEPA) PRIORITIES SUBSTANCES LISTS: Hydrogen is not on the CEPA Priorities Substances Lists.

CANADIAN WHMIS SYMBOLS:

Class A: Compressed Gases

Class B1: Flammable Gas

16. OTHER INFORMATION

PREPARED BY: CHEMICAL SAFETY ASSOCIATES, Inc.

PO Box 3519, La Mesa, CA 91944-3519

619/670-0609

The information contained herein is based on data considered accurate. However, no warranty is expressed or implied regarding the accuracy of these data or the results to be obtained from the use thereof. AIRGAS, Inc. assumes no responsibility for injury to the vendee or third persons proximately caused by the material if reasonable safety procedures are not adhered to as stipulated in the data sheet.

Additionally, AIRGAS, Inc. assumes no responsibility for injury to vendee or third persons proximately caused by abnormal use of the material even if reasonable safety procedures are followed. Furthermore, vendee assumes the risk in his use of the material.

DEFINITIONS OF TERMS

A large number of abbreviations and acronyms appear on a MSDS. Some of these which are commonly used include the following:

CAS #:

This is the Chemical Abstract Service Number that uniquely identifies each constituent.

EXPOSURE LIMITS IN AIR:

CEILING LEVEL: The concentration that shall not be exceeded during any part of the working exposure.

LOQ: Limit of Quantitation.

MAK: Federal Republic of Germany Maximum Concentration Values in the workplace.

NE: Not Established. When no exposure guidelines are established, an entry of NE is made for reference.

NIC: Notice of Intended Change.

NIOSH CEILING: The exposure that shall not be exceeded during any part of the workday. If instantaneous monitoring is not feasible, the ceiling shall be assumed as a 15-minute TWA exposure (unless otherwise specified) that shall not be exceeded at any time during a workday.

NIOSH RELs: NIOSH’s Recommended Exposure Limits.

PEL-Permissible Exposure Limit: OSHA’s Permissible Exposure

Limits. This exposure value means exactly the same as a TLV, except that it is enforceable by OSHA. The OSHA Permissible Exposure

Limits are based in the 1989 PELs and the June, 1993 Air

Contaminants Rule (Federal Register: 58: 35338-35351 and 58:

40191). Both the current PELs and the vacated PELs are indicated.

The phrase, “Vacated 1989 PEL,” is placed next to the PEL that was vacated by Court Order.

SKIN: Used when a there is a danger of cutaneous absorption.

STEL-Short Term Exposure Limit: Short Term Exposure Limit, usually a 15-minute time-weighted average (TWA) exposure that should not be exceeded at any time during a workday, even if the 8-hr

TWA is within the TLV-TWA, PEL-TWA or REL-TWA.

TLV-Threshold Limit Value: An airborne concentration of a substance that represents conditions under which it is generally believed that nearly all workers may be repeatedly exposed without adverse effect. The duration must be considered, including the 8-hour.

TWA-Time Weighted Average: Time Weighted Average exposure concentration for a conventional 8-hr (TLV, PEL) or up to a 10-hr (REL) workday and a 40-hr workweek.

IDLH-Immediately Dangerous to Life and Health: This level represents a concentration from which one can escape within 30minutes without suffering escape-preventing or permanent injury.

HAZARDOUS MATERIALS IDENTIFICATION SYSTEM

HAZARD RATINGS:

This rating system was developed by the

National Paint and Coating Association and has been adopted by industry to identify the degree of chemical hazards.

HEALTH HAZARD:

0 (Minimal Hazard: No significant health risk, irritation of skin or eyes not anticipated. Skin Irritation: Essentially non-irritating. PII or Draize

= “0”. Eye Irritation: Essentially non-irritating, or minimal effects which clear in < 24 hours [e.g. mechanical irritation]. Draize = “0”. Oral

Toxicity LD

50

Rat: < 5000 mg/kg. Dermal Toxicity LD

2000 mg/kg. Inhalation Toxicity 4-hrs LC

50

50

Rat or Rabbit: <

Rat: < 20 mg/L.); 1 (Slight

Hazard: Minor reversible Injury may occur; slightly or mildly irritating.

Skin Irritation: Slightly or mildly irritating. Eye Irritation: Slightly or mildly irritating. Oral Toxicity LD

50

Rat: > 500-5000 mg/kg. Dermal

Toxicity LD

50

Rat or Rabbit: > 1000-2000 mg/kg. Inhalation Toxicity

LC

50

4-hrs Rat: > 2-20 mg/L); 2 (Moderate Hazard: Temporary or transitory injury may occur. Skin Irritation: Moderately irritating; primary irritant; sensitizer. PII or Draize > 0, < 5. Eye Irritation: Moderately to severely irritating and/or corrosive; reversible corneal opacity; corneal involvement or irritation clearing in 8-21 days. Draize > 0, < 25. Oral

Toxicity LD

50

Rat: > 50-500 mg/kg. Dermal Toxicity LD

50

> 200-1000 mg/kg. Inhalation Toxicity LC

50

Rat or Rabbit:

4-hrs Rat: > 0.5-2 mg/L.);

3 (Serious Hazard: Major injury likely unless prompt action is taken and medical treatment is given; high level of toxicity; corrosive. Skin

Irritation: Severely irritating and/or corrosive; may destroy dermal tissue, cause skin burns, dermal necrosis. PII or Draize > 5-8 with destruction of tissue. Eye Irritation: Corrosive, irreversible destruction of ocular tissue; corneal involvement or irritation persisting for more than 21 days. Draize > 80 with effects irreversible in 21 days. Oral

Toxicity LD

50

Rat: > 1-50 mg/kg. Dermal Toxicity LD

50

Rat or Rabbit: >

20-200 mg/kg. Inhalation Toxicity LC

50

4-hrs Rat: > 0.05-0.5 mg/L.); 4

(Severe Hazard: Life-threatening; major or permanent damage may result from single or repeated exposure. Skin Irritation: Not appropriate. Do not rate as a “4”, based on skin irritation alone. Eye

Irritation: Not appropriate. Do not rate as a “4”, based on eye irritation alone. Oral Toxicity LD

50

Rat: < 1 mg/kg. Dermal Toxicity LD

50

Rat or

Rabbit: < 20 mg/kg. Inhalation Toxicity LC

50

4-hrs Rat: < 0.05 mg/L).

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DEFINITIONS OF TERMS (Continued)

HAZARDOUS MATERIALS IDENTIFICATION SYSTEM HAZARDOUS MATERIALS IDENTIFICATION SYSTEM

HAZARD RATINGS (continued):

FLAMMABILITY HAZARD:

0 (Minimal Hazard-Materials that will not burn in air when exposure to a temperature of 815.5

°C [1500°F] for a period of 5 minutes.); 1 (Slight

Hazard-Materials that must be pre-heated before ignition can occur.

Material require considerable pre-heating, under all ambient temperature conditions before ignition and combustion can occur,

Including: Materials that will burn in air when exposed to a temperature of 815.5

°C (1500°F) for a period of 5 minutes or less; Liquids, solids and semisolids having a flash point at or above 93.3

°C [200°F] (e.g.

OSHA Class IIIB, or; Most ordinary combustible materials [e.g. wood, paper, etc.]; 2 (Moderate Hazard-Materials that must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur. Materials in this degree would not, under normal conditions, form hazardous atmospheres in air, but under high ambient temperatures or moderate heating may release vapor in sufficient quantities to produce hazardous atmospheres in air, Including: Liquids having a flash-point at or above 37.8

°C [100°F]; Solid materials in the form of course dusts that may burn rapidly but that generally do not form explosive atmospheres; Solid materials in a fibrous or shredded form that may burn rapidly and create flash fire hazards (e.g. cotton, sisal, hemp; Solids and semisolids that readily give off flammable vapors.); 3 (Serious Hazard- Liquids and solids that can be ignited under almost all ambient temperature conditions. Materials in this degree produce hazardous atmospheres with air under almost all ambient temperatures, or, unaffected by ambient temperature, are readily ignited under almost all conditions, including: Liquids having a flash point below 22.8

°C [73°F] and having a boiling point at or above

38

°C [100°F] and below 37.8°C [100°F] [e.g. OSHA Class IB and IC];

Materials that on account of their physical form or environmental conditions can form explosive mixtures with air and are readily dispersed in air [e.g., dusts of combustible solids, mists or droplets of flammable liquids]; Materials that burn extremely rapidly, usually by reason of self-contained oxygen [e.g. dry nitrocellulose and many organic peroxides]); 4 (Severe Hazard-Materials that will rapidly or completely vaporize at atmospheric pressure and normal ambient temperature or that are readily dispersed in air, and which will burn readily, including: Flammable gases; Flammable cryogenic materials;

Any liquid or gaseous material that is liquid while under pressure and has a flash point below 22.8

°C [73°F] and a boiling point below 37.8°C

[100

°F] [e.g. OSHA Class IA; Material that ignite spontaneously when exposed to air at a temperature of 54.4

°C [130°F] or below [e.g. pyrophoric]).

PHYSICAL HAZARD:

0 (Water Reactivity: Materials that do not react with water. Organic

Peroxides: Materials that are normally stable, even under fire conditions and will not react with water. Explosives: Substances that are Non-Explosive. Unstable Compressed Gases: No Rating.

Pyrophorics: No Rating. Oxidizers: No “0” rating allowed. Unstable

Reactives: Substances that will not polymerize, decompose, condense or self-react.); 1 (Water Reactivity: Materials that change or decompose upon exposure to moisture. Organic Peroxides: Materials that are normally stable, but can become unstable at high temperatures and pressures. These materials may react with water, but will not release energy. Explosives: Division 1.5 & 1.6 substances that are very insensitive explosives or that do not have a mass explosion hazard.

Compressed Gases: Pressure below OSHA definition. Pyrophorics:

No Rating. Oxidizers: Packaging Group III; Solids: any material that in either concentration tested, exhibits a mean burning time less than or equal to the mean burning time of a 3:7 potassium bromate/cellulose mixture and the criteria for Packing Group I and II are not met. Liquids:

any material that exhibits a mean pressure rise time less than or equal to the pressure rise time of a 1:1 nitric acid (65%)/cellulose mixture and the criteria for Packing Group I and II are not met. Unstable Reactives:

Substances that may decompose, condense or self-react, but only under conditions of high temperature and/or pressure and have little or no potential to cause significant heat generation or explosive hazard.

Substances that readily undergo hazardous polymerization in the absence of inhibitors.);

HAZARD RATINGS (continued):

PHYSICAL HAZARD (continued):

2 (Water Reactivity: Materials that may react violently with water.

Organic Peroxides: Materials that, in themselves, are normally unstable and will readily undergo violent chemical change, but will not detonate. These materials may also react violently with water.

Explosives: Division 1.4 – Explosive substances where the explosive effect are largely confined to the package and no projection of fragments of appreciable size or range are expected. An external fire must not cause virtually instantaneous explosion of almost the entire contents of the package. Compressed Gases: Pressurized and meet

OSHA definition but < 514.7 psi absolute at 21.1

°C (70°F) [500 psig].

Pyrophorics: No Rating. Oxidizers: Packing Group II Solids: any material that, either in concentration tested, exhibits a mean burning time of less than or equal to the mean burning time of a 2:3 potassium bromate/cellulose mixture and the criteria for Packing Group I are not met. Liquids: any material that exhibits a mean pressure rise time less than or equal to the pressure rise of a 1:1 aqueous sodium chlorate solution (40%)/cellulose mixture and the criteria for Packing Group I are not met. Unstable Reactives: Substances that may polymerize, decompose, condense, or self-react at ambient temperature and/or pressure, but have a low potential for significant heat generation or explosion. Substances that readily form peroxides upon exposure to air or oxygen at room temperature); 3 (Water Reactivity: Materials that may form explosive reactions with water. Organic Peroxides: Materials that are capable of detonation or explosive reaction, but require a strong initiating source, or must be heated under confinement before initiation; or materials that react explosively with water. Explosives:

Division 1.2 – Explosive substances that have a fire hazard and either a minor blast hazard or a minor projection hazard or both, but do not have a mass explosion hazard. Compressed Gases: Pressure >

514.7 psi absolute at 21.1

°C (70°F) [500 psig]. Pyrophorics: No Rating.

Oxidizers: Packing Group I Solids: any material that, in either concentration tested, exhibits a mean burning time less than the mean burning time of a 3.:2 potassium bromate/cellulose mixture. Liquids:

Any material that spontaneously ignites when mixed with cellulose in a

1:1 ratio, or which exhibits a mean pressure rise time less than the pressure rise time of a 1:1 perchloric acid (50%)/cellulose mixture.

Unstable Reactives: Substances that may polymerize, decompose, condense or self-react at ambient temperature and/or pressure and have a moderate potential to cause significant heat generation or explosion.); 4 (Water Reactivity: Materials that react explosively with water without requiring heat or confinement. Organic Peroxides:

Materials that are readily capable of detonation or explosive decomposition at normal temperature and pressures. Explosives:

Division 1.1 & 1.2-explosive substances that have a mass explosion hazard or have a projection hazard. A mass explosion is one that affects almost the entire load instantaneously. Compressed Gases: No

Rating. Pyrophorics: Add to the definition of Flammability “4”.

Oxidizers: No “4” rating. Unstable Reactives: Substances that may polymerize, decompose, condense or self-react at ambient temperature and/or pressure and have a high potential to cause significant heat generation or explosion.). PPE Rating B: Hand and eye protection is required for routine chemical use. PPE Rating C: Hand, eye, and body protection may be required for routine chemical use.

HMIS PERSONAL PROTECTION EQUIPMENT CODES:

A = Safety Glasses; B= Safety Glasses, Gloves; C = Safety Glasses,

Gloves, Apron; D = ace Shield (w/ safety glasses), Gloves, Apron; E =

Safety Glasses, Gloves, Dust Respirator; F = Safety Glasses, Gloves,

Apron, Dust Respirator Safety Glasses, Gloves, Apron, Dust

Respirator; G = Safety Glasses, Gloves, Chemical Vapor Respirator; H

= Safety Glasses, Gloves, Apron, Chemical Vapor Respirator; I =

Safety Glasses, Gloves, Combination Dust and Chemical Vapor

Respirator; J= Safety Glasses, Gloves, Apron, Combination Dust and

Chemical Vapor Respirator; K = Airline Hood or Mask, Gloves, Full

Protective Suit, Boots; X = Situations Requiring Specialized Attention to

PPE

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MSDS (Document #001026)

DEFINITIONS OF TERMS (Continued)

NATIONAL FIRE PROTECTION ASSOCIATION HAZARD

RATINGS:

HEALTH HAZARD: 0 (material that on exposure under fire conditions would offer no hazard beyond that of ordinary combustible materials); 1

(materials that on exposure under fire conditions could cause irritation or minor residual injury); 2 (materials that on intense or continued exposure under fire conditions could cause temporary incapacitation or possible residual injury); 3 (materials that can on short exposure could cause serious temporary or residual injury); 4 (materials that under very short exposure could cause death or major residual injury).

FLAMMABILITY HAZARD AND REACTIVITY HAZARD: Refer to definitions for “Hazardous Materials Identification System”.

FLAMMABILITY LIMITS IN AIR:

Much of the information related to fire and explosion is derived from the National Fire Protection

Association (NFPA). Flash Point - Minimum temperature at which a liquid gives off sufficient vapors to form an ignitable mixture with air.

Autoignition Temperature: The minimum temperature required to initiate combustion in air with no other source of ignition. LEL - the lowest percent of vapor in air, by volume, that will explode or ignite in the presence of an ignition source. UEL - the highest percent of vapor in air, by volume, that will explode or ignite in the presence of an ignition source.

TOXICOLOGICAL INFORMATION:

Human and Animal Toxicology: Possible health hazards as derived from human data, animal studies, or from the results of studies with similar compounds are presented. Definitions of some terms used in this section are: LD

50

- Lethal Dose (solids & liquids) which kills 50% of the exposed animals; LC

50

- Lethal Concentration (gases) which kills

50% of the exposed animals; ppm concentration expressed in parts of material per million parts of air or water; mg/m

3

concentration expressed in weight of substance per volume of air; mg/kg quantity of material, by weight, administered to a test subject, based on their body

ECOLOGICAL INFORMATION:

EC is the effect concentration in water. BCF = Bioconcentration Factor, which is used to determine if a substance will concentrate in lifeforms which consume contaminated plant or animal matter. TL

m

= median threshold limit; Coefficient of Oil/Water Distribution is represented by

log K

ow or log K

oc

and is used to assess a substance’s behavior in the environment.

REGULATORY INFORMATION:

U.S. and CANADA:

This section explains the impact of various laws and regulations on the material. ACGIH: American Conference of Governmental Industrial

Hygienists, a professional association which establishes exposure limits. EPA is the U.S. Environmental Protection Agency. NIOSH is the National Institute of Occupational Safety and Health, which is the research arm of the U.S. Occupational Safety and Health

Administration (OSHA). WHMIS is the Canadian Workplace

Hazardous Materials Information System. DOT and TC are the U.S.

Department of Transportation and the Transport Canada, respectively.

Superfund Amendments and Reauthorization Act (SARA); the

Canadian Domestic/Non-Domestic Substances List (DSL/NDSL); the

U.S. Toxic Substance Control Act (TSCA); Marine Pollutant status according to the DOT; the Comprehensive Environmental Response,

Compensation, and Liability Act (CERCLA or Superfund); and various state regulations. This section also includes information on the precautionary warnings which appear on the material’s package label.

OSHA - U.S. Occupational Safety and Health Administration.

weight in kg. Other measures of toxicity include TDLo, the lowest dose to cause a symptom and TCLo the lowest concentration to cause a symptom; TDo, LDLo, and LDo, or TC, TCo, LCLo, and LCo, the lowest dose (or concentration) to cause lethal or toxic effects. Cancer

Information: The sources are: IARC - the International Agency for

Research on Cancer; NTP - the National Toxicology Program, RTECS

- the Registry of Toxic Effects of Chemical Substances, OSHA and

CAL/OSHA. IARC and NTP rate chemicals on a scale of decreasing potential to cause human cancer with rankings from 1 to 4.

Subrankings (2A, 2B, etc.) are also used. Other Information: BEI -

ACGIH Biological Exposure Indices, represent the levels of determinants which are most likely to be observed in specimens collected from a healthy worker who has been exposed to chemicals to the same extent as a worker with inhalation exposure to the TLV.

HYDROGEN - H

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MSDS (Document #001026)

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