MATERIAL
LindeGAS, LLC (216) 642-6600
Linde Gas LLC (216) 642-6600
AGA Gas INC. SAFETY
P.O. Box 94737 WOODS BLVD
P.O. Box 94737
6055 ROCKSIDE DATA SHEET
Cleveland,94737 44101
Cleveland, Ohio 44101
P.O. BOX Ohio
www.us.lindegas.com
www.us.lindegas.com
CLEVELAND, OH 44101-4737 No. 158
PRODUCT NAME CAS #
1333-74-0
Hydrogen, Refrigerated Liquid
DOT I.D. No.:
UN 1966
Hydrogen, refrigerated liquid (D.O.T.);
TRADE NAME AND SYNONYMS
Liquid Hydrogen; Para Hydrogen; Liquefied Hydrogen
DOT Hazard Class:
Division 2.1
CHEMICAL NAME AND SYNONYMS
Formula
Liquefied H2 or Para H2
Liquid Hydrogen; Para Hydrogen; Liquefied Hydrogen
ISSUE DATES AND REVISIONS Chemical Family:
Cryogenic Flammable Inorganic
Revised January 1995
HEALTH HAZARD DATA
TIME WEIGHTED AVERAGE EXPOSURE LIMIT
Hydrogen is a simple asphyxiant (ACGIH 1994-1995). Oxygen levels should be maintained
at greater than 18 molar % at normal (Continued on Page 4)
SYMPTOMS OF EXPOSURE
Inhalation: High concentrations of hydrogen so as to exclude an adequate supply of oxygen to the lungs causes
dizziness, deeper breathing due to air hunger, possible nausea and eventual unconsciousness.
Contact with the cryogenic liquid can cause tissue freezing or frostbite on dermal contact or if splashed in the eyes.
TOXICOLOGICAL PROPERTIES
Hydrogen is inactive biologically and essentially nontoxic; therefore, the major property is the exclusion of an adequate
supply of oxygen to the lungs.
Frostbite effects are a change in color of the skin to gray or white, possibly followed by blistering.
Hydrogen is not listed in the IARC, NTP or by OSHA as a carcinogen or potential carcinonen.
Persons in ill health where such illness would be aggravated by exposure to this product should not be allowed to work
with or handle this product.
RECOMMENDED FIRST AID TREATMENT
PROMPT MEDICAL ATTENTION IS MANDATORY IN ALL CASES OF OVEREXPOSURE TO HYDROGEN. RESCUE
PERSONNEL SHOULD BE EQUIPPED WITH SELF-CONTAINED BREATHING APPARATUS AND BE COGNIZANT
OF EXTREME FIRE AND EXPLOSION HAZARD.
Inhalation: Conscious persons should be assisted to an uncontaminated area and inhale fresh air. Quick removal from
the contaminated area is most important. Unconscious persons should be moved to an uncontaminated area, given
assisted respiracion and supplemental oxygen. Further treatment should be symptomatic and supportive.
For Dermal Contact or Frostbite: Flush affected areas with lukewarm water. DO NOT USE HOT WATER. A physician
should see the patient promptly if the cryogenic 鈥渂urn鈥? has resulted in blistering of the dermal surface or deep tissue
freezing.
Information contained in this material safety data sheet is offered without charge for use by technically qualified personnel at their discretion and
risk. All statements, technical information and recommendations contained herein are based on tests and data which we believe to be reliable, but
the accuracy or completeness thereof is not guaranteed and no warranty of any kind is made with respect thereto. This information is not intended
as a license to operate under or a recommendation to practice or infringe any patent of this Company or others covering any process, composition
of matter or use.
Since the Company shall have no control of the use of the product described herein, the Company assumes no liability for loss or damage incurred
from the proper or improper use of such product.
Hydrogen, Refrigerated Liquid
HAZARDOUS MIXTURES OF OTHER LIQUIDS, SOLIDS, OR GASES
Hydrogen is flammable over a very wide range in air.
PHYSICAL DATA
BOILING POINT LIQUID DENSITY AT BOILING POINT
-423潞F (-252.8潞C) 4.43 lb/ft3 (70.96 kg/m3)
@ 70潞F (21.1潞C) = Above the critical
VAPOR PRESSURE GAS DENSITY AT 70掳F. 1 atm
.0052 1b/ft3 (.0833 kg/m3)
temperature of -399.8潞F (-239.9潞C)
SOLUBILITY IN WATER FREEZING POINT
Very slightly -434.6潞F (-259.2潞C)
EVAPORATION RATE SPECIFIC GRAVITY (AIR=1)
Cryogenic Liquid @ 70潞F (21.1潞C) = .069
Clear, colorless, odorless liquid and gas
APPEARANCE AND ODOR
FIRE AND EXPLOSION HAZARD DATA
AUTO IGNITION TEMPERATURE
FLASH POINT (Method used) FLAMMABLE LIMITS % BY VOLUME (See Page 4)
N/A (Gas) LEL 4 UEL 74.5
1058鈥 (570鈥)
ELECTRICAL CLASSIFICATION
EXTINGUISHING MEDIA
Class 1, Group B
Water, carbon dioxide, dry chemical
SPECIAL FIRE FIGHTING PROCEDURES
If possible, stop the flow of hydrogen. Hydrogen burns with an almost invisible flame
of relatively low thermal radiation. If liquid cylinders are involved in a fire, safely
relocate or keep cool with water spray.
UNUSUAL FIRE AND EXPLOSION HAZARDS
Hydrogen is very light and rises very rapidly in air. Should a hydrogen fire be extinguished and the flow of gas continue,
increase ventilation to prevent an explosion hazard, particularly in the upper portions of buildings or sheds where the
gas might 鈥渃ollect.鈥?
REACTIVITY DATA
STABILITY CONDITIONS TO AVOID
Unstable None
Stable X
INCOMPATIBILITY (Materials to avoid)
Oxidizers
HAZARDOUS DECOMPOSITION PRODUCTS
None
HAZARDOUS POLYMERIZATION CONDITIONS TO AVOID
May Occur
None
Will Not Occur X
SPILL OR LEAK PROCEDURES
STEPS TO BE TAKEN IN CASE MATERIAL IS RELEASED OR SPILLED
See Note on Page 4
WASTE DISPOSAL METHOD
See Note on Page 4
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Hydrogen, Refrigerated Liquid
SPECIAL PROTECTION INFORMATION
Positive pressure air line with mask or self-contained
RESPIRATORY PROTECTION
(Specify type)
breathinq apparatus should be available for emergency use.
VENTILATION LOCAL EXHAUST SPECIAL
N/A
to prevent accumulation above the LEL
Hood with forced ventilation
MECHANICAL (Gen.) OTHER
N/A
In accordance with electrical codes
PROTECTIVE GLOVES
Loose fitting, insulated
EYE PROTECTION
Safety goggles or glasses, plus face shield
OTHER PROTECTIVE EQUIPMENT
Safety shoes, safety shower
SPECIAL PRECAUTIONS*
SPECIAL LABELING INFORMATION
DOT Hazard Class: Division 2.1
DOT Shipping Name: Hydrogen, refrigerated liquid
I.D. No.: UN 1966
DOT Shipping Label: Flammable Gas
SPECIAL HANDLING RECOMMENDATIONS
See Note on Page 4 re: Spill or Leak Procedures and Compressed Gas Association鈥檚 Pamphlet P-12.
SPECIAL STORAGE RECOMMENDATIONS
See Note on Page 4 re: Spill or Leak Procedures and Compressed Gas Association鈥檚 Pamphlet P-12.
SPECIAL PACKAGING RECOMMENDATIONS
For assistance in designing equipment to contain liquid hydrogen, contact your supplier. For handling gaseous
hydrogen refer to your supplier鈥檚 Material Safety Data Sheet for hydrogen.
OTHER RECOMMENDATIONS OR PRECAUTIONS
Earth-ground and bond all lines and equipment associated with the hydrogen system. Electrical equipment should be
non-sparking or explosion proof. Liquefied gas cylinders should not be refilled except by qualified producers of these
products. Shipment of a compressed gas container which has not been filled by the owner or with his (written) consent
is a violation of Federal Law (49CFR).
(Continued on Page 4)
*Various Government Agencies (i.e. Department of Transportation, Occupational Safety and Health Administration, Food and Drug Administration
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and others) may have specific regulations concerning the transportation, handling, storage or use of this product which will not be reflected in this
data sheet. The customer should review these regulations to ensure that he is in full compliance.
Hydrogen, Refrigerated Liquid
HEALTH HAZARD DATA: (Continued)
Note: Except where specified, the health hazard data and most of the other data in this material safety data sheet are for
gaseous hydrogen. One volume of liquid hydrogen at its boiling point and atmospheric pressure will vaporize into
approximately 850 volumes of gaseous hydrogen at 70潞F (21.1潞C) and 1 atmosphere.
TIME WEIGHTED AVERAGE EXPOSURE LIMIT: (Continued)
atmospheric pressure (P02>135 torr). OSHA 1993 PEL (8 Hr. TWA) = None listed.
NOTE RE SPILL OR LEAK PROCEDURES:
Liquid hydrogen is delivered to a customer into stationary vacuum-jacketed vessels at the customer鈥檚 location or in
portable vacuum-jacketed 鈥渓iquid鈥? cylinders.
Stationary customer-site vessels should be operated in accordance with the manufacturer鈥檚 and your supplier鈥檚
instructions. Do not attempt to repair, adjust or in any other way modify the operation of these vessels. If there is a
malfunction or other type of operational problem with the vessel, contact the closest supplier location immediately. No
smoking or open flames should be allowed near these vessels.
Liquid hydrogen cylinders should be used only in well-ventilated areas of noncombustible construction and in accordance
with the manufacturer鈥檚 and your supplier鈥檚 instructions. These cylinders must always be kept in an upright position.
Specialized hand trucks are needed for their movement. A 鈥渇irst in - first out鈥? inventory system should be used with these
cylinders.
SPECIAL PRECAUTIONS
OTHER RECOMMENDATIONS OR PRECAUTIONS: (Continued)
-
Always secure cylinders in an upright position before transporting them. NEVER transport cylinders in trunks of vehicles,
enclosed vans, truck cabs or in passenger compartments. Always transport liquid cylinders secured in open flatbed or in
open pick-up type vehicles.
Reporting under SARA, Title III, Section 313 not required.
NFPA 704 No. for liquid hydrogen = 3 4 0 None
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