HYDROGEN MATERIAL SAFETY DATA SHEET
SECTION 1. PRODUCT IDENTIFICATION
Arc Gas Products
San Jose CA
REVISION DATE: March 2006
SECTION 2. COMPOSITION/INFORMATION ON INGREDIENTS
Hydrogen is sold as pure product >99%
ACGIH: Simple asphyxiant
SECTION 3. HAZARD IDENTIFICATION
Hydrogen is a flammable, colorless, odorless, compressed gas packaged
in cylinders at
high pressure. It poses an immediate fire and explosive hazard when
exceed 4%. It is much lighter than air and burns with an invisible
concentrations that will cause suffocation are within the flammable
range and must not be
EMERGENCY TELEPHONE NUMBERS
(800) 523-9374 Continental U.S., Canada, and Puerto Rico
(610) 481-7711 other locations
POTENTIAL HEALTH EFFECTS INFORMATION:
INHALATION: Asphyxiant. It should be noted that before suffocation
the lower flammability limit of hydrogen in air would be exceeded
both an oxygen-deficient and explosive atmosphere. Exposure to moderate
concentrations may cause dizziness, headache, nausea and
Exposure to atmospheres containing 8-10% or less oxygen will quickly
unconsciousness without warning leaving individuals unable to protect
Lack of sufficient oxygen may cause serious injury or death.
EYE CONTACT: None
SKIN CONTACT: None
CHRONIC EFFECTS: None
OTHER EFFECTS OF OVEREXPOSURE: None
ROUTE OF ENTRY: Inhalation
TARGET ORGANS: None
EFFECT: Asphyxiation (suffocation)
SYMPTOMS: Exposure to an oxygen-deficient atmosphere (<19.5%) may
drowsiness, nausea, vomiting, excess salivation, diminished mental
alertness, loss of consciousness,
MEDICAL CONDITIONS AGGRAVATED BY OVEREXPOSURE: None
CARCINOGENIC POTENTIAL: Hydrogen is not listed by NTP, OSHA or IARC.
SECTION 4. FIRST AID
INHALATION: Persons suffering from lack of oxygen should be removed to
fresh air. If victim is not
breathing, administer artificial respiration. If breathing is
difficult, administer oxygen. Obtain prompt
SKIN CONTACT: None
EYE CONTACT: None
NOTES TO PHYSICIAN: None
SECTION 5. FIRE AND EXPLOSION
EXTINGUISHING MEDIA: CO2, dry chemical, water spray or fog for
surrounding area. Do not extinguish
until hydrogen source is shut off.
HAZARDOUS COMBUSTION PRODUCTS: None
SPECIAL FIRE FIGHTING INSTRUCTIONS: Evacuate all personnel from danger
cool container with water spray from maximum distance, taking care not
to extinguish flames. If flames
are accidentally extinguished, explosive re-ignition may occur. Stop
flow of gas if without risk while
continuing cooling water spray.
UNUSUAL FIRE AND EXPLOSION HAZARDS: Burns with a pale blue, nearly
Hydrogen is easily ignited with low-ignition energy, including static
electricity. Hydrogen is lighter than air
and can accumulate in the upper sections of enclosed spaces. Pressure
in a container can build up due
to heat, and it may rupture if pressure relief devices should fail to
SECTION 6. ACCIDENTAL RELEASE MEASURES
Evacuate immediate area. Eliminate any possible sources of ignition,
and provide maximum explosion-
proof ventilation. Shut off source of hydrogen, if possible. If leaking
from cylinder, or valve, call the
Air Products' emergency phone number. The presence of a hydrogen flame
can be detected by
approaching cautiously with an outstretched straw broom to make the
SECTION 7. HANDLING AND STORAGE
Specific requirements are listed in NFPA 50A. Cylinder storage
locations should be well-
protected, well-ventilated, dry, and separated from combustible
materials. Cylinders should never
knowingly be allowed to reach a temperature exceeding 125 _F (52 _C).
Cylinders of hydrogen should be
separated from oxygen cylinders or other oxidizers by a minimum
distance of 20 ft., or by a barrier of
noncombustible material at least 5 ft. high having a fire resistance
rating of at least _ hour.
Cylinders should be stored upright with valve protection cap in place
and firmly secured to prevent falling
or being knocked over. Protect cylinders from physical damage; do not
drag, roll, slide or drop. Use a
suitable hand truck for cylinder movement. Post "No Smoking or Open
Flames" signs in the storage
areas. There should be no sources of ignition. All electrical equipment
should be explosion proof in the
storage and use areas. Storage areas must meet national electric codes
for class 1 hazardous areas.
HANDLING: Do not "open" hydrogen cylinder valve before connecting it,
since self-ignition may occur.
Hydrogen is the lightest gas known and may collect in the top of
buildings with out proper ventilation. It
may leak out of a system which is gas-tight for air or other gases.
Leak check system with leak detection
solution, never with flame. If user experiences difficulty operating
cylinder valve, discontinue use and
contact supplier. Use only approved CGA connections. DO NOT USE
ADAPTERS. Never insert an
object (e.g., wrench, screwdriver, pry bar, etc.) into valve cap
openings. Doing so may damage valve,
causing a leak to occur. Use an adjustable strap wrench to remove
over-tight or rusted caps. Never
strike an arc on a compressed gas cylinder or make a cylinder a part of
an electrical circuit.
SPECIAL PRECAUTIONS: Use piping and equipment adequately designed to
withstand pressures to be
encountered. Use a check valve or other protective apparatus in any
line or piping from the cylinder to
prevent reverse flow.
SECTION 8. PERSONAL PROTECTION/EXPOSURE CONTROLS
ENGINEERING CONTROLS: Provide natural or explosion-proof ventilation
adequate to ensure
hydrogen does not reach its lower explosive limit of 4%.
General Use: None
Emergency Use: Air supplied respirators are required in
oxygen-deficient atmospheres. Before
entering area you must check for flammable or oxygen-deficient
PROTECTIVE GLOVES: Work gloves are recommended when handling cylinders.
EYE PROTECTION: Safety glasses are recommended when handling cylinders.
OTHER PROTECTIVE EQUIPMENT: Safety shoes are recommended when handling
SECTION 9. PHYSICAL AND CHEMICAL PROPERTIES
APPEARANCE AND STATE: Colorless gas at normal temperature and pressure.
MOLECULAR WEIGHT: 2.016
: -423.0 _F (-252.8 _C)
FREEZING POINT/MELTING POINT: -434.5 °F (-259.2 _C)
VAPOR PRESSURE (at 70 F): Not applicable
(At 70 F (21.1 C) and 1 atm)
: 0.00521 lb/ft
SOLUBILITY IN WATER
(Vol/Vol at 60 F (15.6 C))
(At 70 F (21.1 C) and 1 atm)
: 192 ft
SECTION 10. REACTIVITY/STABILITY
CHEMICAL STABILITY: Stable
CONDITIONS TO AVOID: None
INCOMPATIBILITY (Materials to Avoid): Oxidizing agents. Some steels are
susceptible to hydrogen
embrittlement at high pressures and temperatures.
HAZARDOUS DECOMPOSITION PRODUCTS: None
HAZARDOUS POLYMERIZATION: Will not occur.
SECTION 11. TOXICOLOGICAL INFORMATION
Hydrogen is a simple asphyxiant.
SECTION 12. ECOLOGICAL INFORMATION
No adverse ecological effects are expected. Hydrogen does not contain
any Class I or Class II ozone
depleting chemicals (40 CFR Part 82). Hydrogen is not listed as a
marine pollutant by
DOT (49 CFR Part 171).
SECTION 13. DISPOSAL
DISPOSAL METHOD: Do not attempt to dispose of residual or unused
product in the cylinder.
Return to supplier for safe disposal.
Residual product within process system may be vented at a controlled
rate, to the atmosphere through a
vent stack that discharges to an elevated point. This stack should be
in an isolated area away from
SECTION 14. TRANSPORTATION
SHIPPING NAME: Hydrogen, compressed
HAZARD CLASS: 2.1 (Flammable Gas)
IDENTIFICATION NUMBER: UN1049
PRODUCT RQ: None
SHIPPING LABEL(s): Flammable gas.
PLACARD (When required): Flammable gas.
SPECIAL SHIPPING INFORMATION: Cylinder should be transported in a
secure upright position in a
well ventilated truck. NEVER TRANSPORT IN PASSENGER COMPARTMENT OF A
Shipment of compressed gas cylinders which have not been filled with
the owner's consent is a violation
of Federal law (49 CFR Part 173.301 (b)).
SECTION 15. REGULATORY INFORMATION
U.S. FEDERAL REGULATIONS:
EPA - ENVIRONMENTAL PROTECTION AGENCY
CERCLA: Comprehensive Environmental Response, Compensation, and
Liability Act of 1980
(40 CFR Parts 117 and 302):
Reportable Quantity (RQ): None
SARA: Superfund Amendment and Reauthorization Act
SECTION 302/304: Requires emergency planning on threshold planning
quantities (TPQ) and
release reporting based on reportable quantities (RQ) of EPA's
extremely hazardous substances
(40 CFR Part 355).
Extremely Hazardous Substances: None
Threshold Planning Quantity (TPQ): None
SECTIONS 311/312: Require submission of material safety data sheets
(MSDSs) and chemical
inventory reporting with identification of EPA defined hazard classes
(40 CFR Part 370). The
hazard classes for this product are:
SECTION 313: Requires submission of annual reports of release of toxic
chemicals that appear in
40 CFR Part 372.
Hydrogen does not require reporting under Section 313
40 CFR PART 68: Risk Management for Chemical Accidental Release.
Requires the development
and implementation of risk management programs at facilities that
manufacture, use, store, or
otherwise handle regulated substances in quantities that exceed
Hydrogen is not listed as a regulated substance. However, any process
that involves a
flammable gas on site in one location, in quantities of 10,000 pounds
(4,553 kg) or greater, is
covered under this regulation.
TSCA: Toxic Substance Control Act: Hydrogen is listed on the TSCA
OSHA - OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION:
29 CFR 1910.119: Process Safety Management of Highly Hazardous
facilities to develop a process safety management program based on
Threshold Quantities (TQ) of
highly hazardous chemicals.
Hydrogen is not listed in Appendix A as a highly hazardous chemical.
However, any process
that involves a flammable gas on site in one location, in quantities of
10,000 pounds (4,553 kg)
or greater is covered under this regulation unless it is used as fuel.
SECTION 16. OTHER INFORMATION
FLAMMABILITY: = 4
FLAMMABILITY: = 4
= SA (CGA recommends this to designate simple asphyxiant)
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