Product ID:HYDROGEN
MSDS Date:07/10/1986
FSC:6830
NIIN:00-764-7025
MSDS Number: BHDVG

Emergency Phone: 1-800-322-9092

Info Phone: 215-481-8257

Cage: 00742

Telephone: 800-345-3148/ 800-752-1597

Cage: 5H199

HYDROGEN

CAS: 1333-74-0

RTECS: MW8900000

Routes of Entry: Inhalation:YES Skin:YES Ingestion:YES
Reports of Carcinogenicity:NTP:NO IARC:NO OSHA:NO
Health Hazards Acute and Chronic:HYDROGEN IS NONTOXIC & CLASSIFIED AS A
SIMPLY ASPHYXIANT,BUT IT IS EXTREMELY FLAMMABLE.THE AMOUNT OF
HYDROGEN GAS NECESSARY TO REDUCE OXYGEN CONCENTRATIONS BELOW LIFE
SUPPORT LEVELS IS WELL WITHIN THE FLAMMABLE RANGE.DO NOT ENTER
AREAS CONTAINING FLAMMABLE MIXTURES DUE TO THE IMMEDIATE FIRE &
EXPLOSION HAZARD.
Effects of Overexposure:SYMPTOMS OF ANOXIA OCCUR ONLY WHEN GAS
CONCENTRATIONS ARE WITHIN THE FLAMMABLE RANGE & THE MIXTURE HAS NOT
IGNITED.DO NOT ENTER AREAS W/IN THE FLAMMABLE RANGE DUE TO THE
IMMEDIATE FIRE & EXPLOSION HAZ ARD.CONTACT OF SKIN W/LIQ HYDROGEN
OR COLD GAS VAPORS CAN CAUSE CRYOGENIC(EXTREME LOW
TEMPERATURE)BURNS & FREEZE TISSUES

First Aid:IF CRYOGENIC LIQ OR COLD BOIL-OFF GAS CONTACTS WORKER'S SKIN
OR EYES,FROZEN TISSUES SHOULD BE SEEN PROMPTLY BYA PHYSICIAN.FIRST
DEGREE BURNS OR SECOND BURNS WHICH ARE THE RESULT OF FIRE EXPOSURE
& ARE LOCALIZED TO A PORTION OF AN EXTEMITY OR OTHER SMALL AREA OF
THE BODY MAY BE IMMERSED IN COOL WTR FOR 10-20 MINS TO RELIEVE
PAIN.DO NOT IMMERSE THE WHOLE BODY IN A COLD BATH.

Flash Point:NA
Autoignition Temp:Autoignition Temp Text:932F
Lower Limits:74.2%
Upper Limits:4.0%
Extinguishing Media:DRY CHEMICAL, CARBON DIOXIDE, OR HALON.
Fire Fighting Procedures:SHUT OFF SOURCE OF HYDROGEN.WHEN
POSSIBLE,ALLOW FIRE TO BURN ITSELF OUT.SPRAY WATER ON ADJOINING
EQUIPMENT TO KEEP IT COOL.
Unusual Fire/Explosion Hazard:HYDROGEN CAN BURN W/ALMOST AN INVISIBLE
FLAME OF LOW THERMAL RADIATION.PEOPLE HAVE UNKNOWINGLY WALKED INTO
HYDRGOGEEN FLAMES.FLAME PROPAGATES AT RAPID RATE.

Spill Release Procedures:DO NOT ENTER AREAS CONTAINING FLAMMABLE
MIXTURES OF HYDROGEN IN AIR.AVOID CONTACT OF SKIN W/LIQ HYDROGEN OR
COLD BOIL-OFF GAS.VENTILATE ENCLOSED AREASTO PREVENT FORMATION OF
FLAMMABLE OR OXYGEN-DEFICI ENT ATMOSPHERES.

Handling and Storage Precautions:PREVENT CONTACT OF LIQ OR COLD GASEOUS
HYDROGEN W/EXPOSED SKIN.USE SUITABLE HAND TRUCK.STORE LIQ
CONTAINERS &CYLS IN WELL VENTILATED AREA.
Other Precautions:SEGREGATE FULL/EMPTY CYLS.LIQ HYDROGEN IN EXPOSED
PIPING CAN ACTUALLY CAUSE AIR TO CONDENSE &LIQUEFY.THE NITROGEN IN
THIS LIQ CAN EVAPORATE MORE RAPIDLY,LEAVING AN OXYGEN ENRICHED LIQ
BEHIND.

Respiratory Protection:OXYGEN-DEFICIENT ATMOSPHERES ARE IN THE
FLAMMABLE RANGE. DO NOT ENTER.
Ventilation:NATURAL OR MECHANICAL WHERE GAS OR VAPOR IS
PRESENT.MECHANICAL VENT MUST MEET NATIONAL ELECTRIC CODE REQ FOR
CLS I GRP B
Protective Gloves:LIQ LOOSE FITTING OF IMPERMEABLE MTRL
Eye Protection:SAFETY GOGGLE /GLASSES
Other Protective Equipment:NONE
Supplemental Safety and Health
NK

Boiling Pt:B.P. Text:-423.0F
Vapor Pres:NA
Vapor Density:@68F 20C
Spec Gravity:@ BOILING POINT
Solubility in Water:@68F 20C
Appearance and Odor:BOTH LIQUID AND GASEOUS HYDROGEN ARE COLORLESS AND
ODORLESS.

Stability Indicator/Materials to Avoid:YES
OXIDIZING MATERIALS.SOME STEELS ARE SUSCEPTIBLE TO HYDROGEN ATTACK OR
EMBRITTLEMENT AT HIGH TEMPERATURE & PRESSURE.
Stability Condition to Avoid:SOURCES OF IGNITION,SPARKS,FLAMES,HOT
OBJECTS.
Hazardous Decomposition Products:NONE

Waste Disposal Methods:DO NOT ATTEMPT TO DISPOSE OF RESIDUAL GASEOUS
HYDROGEN IN CYLS.RETURN CYLS TO AIR PRODUCTS W/POSITIVE RESIDUAL
PRESSURE,CYL VALVES TIGHTLY CLOSED,& VALVE CAP IN PLACE.DO NOT
DISPOSE OF LIQ HYDROGEN - CONTACT AIR PRODUCTS FOR ASSISTANCE.

Disclaimer (provided with this information by the compiling agencies):
This information is formulated for use by elements of the Department
of Defense. The United States of America in no manner whatsoever,
expressly or implied, warrants this information to be accurate and
disclaims all liability for its use. Any person utilizing this
document should seek competent professional advice to verify and
assume responsibility for the suitability of this information to their
particular situation.