Product ID:HYDROGEN, G-4
MSDS Date:10/05/1989
FSC:6830
NIIN:00N053986
MSDS Number: BVWBV

AIRCO

575 MOUNTAIN AVE
MURRAY HILL, NJ 07974
US

Emergency Phone: 800-424-9300 (CHEMTREC)

Info Phone: 201-464-8100

Cage: AIRCO

AIRCO INC, AIRCO INDUSTRIAL GASES DIV.

MURRAY HILL, NJ 07974-2006 US

Telephone: 800-424-9300(CHEMTREC)

Cage: 00741

HYDROGEN

CAS: 1333-74-0

RTECS: MW8900000

Fraction By Weight: >/=99.9%

OSHA PEL N/K

ACGIH TLV: ASPHYXIANT (MFR)

RADIA. DO NOT DETECT LEAKS W/HANDS/OPEN FLAME! SHLD

RTECS: 9999999ZZ

MUST BE USED TO PVNT BUILDUP OF HYDROGEN GAS,THUS

RTECS: 9999999ZZ

AREA. USE ONLY SPK PROOF TOOLS TO CLOSE OPEN VALVES.

RTECS: 9999999ZZ

OF FLAM GAS MAY ACCUM. WATER FOG MAY BE USED TO

RTECS: 9999999ZZ

APPROACH TYPE PROT SUITS & NIOSH/MSHA APPRVD POS

RTECS: 9999999ZZ

PORTIONS OF BLDGS/SHEDS WHERE GAS MIGHT COLLECT.

RTECS: 9999999ZZ

BUT EXPLODE IF EXPOSED TO LIGHT. LITHIUM

RTECS: 9999999ZZ

SUPPLEMENTAL OXYGEN. FURTHER TREATMENT

RTECS: 9999999ZZ

IMMED FLUSH W/POTABLE H*2O FOR @ LEAST 15 MIN.

RTECS: 9999999ZZ

DO NOT DRAG, SLIDE/ROLL CYLS. USE SUITABLE

RTECS: 9999999ZZ

REGULATOR WHEN CONNECTING CYL TO LOWER PRESS(<3000

RTECS: 9999999ZZ

INCR DISCHARGE RATE OF PROD FROM CYL. USE CHECK

RTECS: 9999999ZZ

CYL. PROT CYLS FROM PHYSICAL DMG. STORE IN COOL,

RTECS: 9999999ZZ

FROM HEAVILY TRAFFICKED AREAS & EMER EXITS. DO NOT

RTECS: 9999999ZZ

SHLD BE STORED UPRIGHT & FIRMLY SECURED TO PVNT

RTECS: 9999999ZZ

TO PVNT FULL CYLS BEING STORED FOR EXCESS TIME. POST

RTECS: 9999999ZZ

SOURCES OF IGNIT IN STOR/USE AREA. DO NOT STORE

RTECS: 9999999ZZ

COMPRESSED GAS CYL IN ENCLSD VEHICLE SUCH AS CAR

RTECS: 9999999ZZ

CYLS SHOULD NOT BE REFILLED EXCEPT BY QUALIFIED

RTECS: 9999999ZZ

COMPRESSED GAS CYL, WHICH HAS NOT BEEN FILLED BY

RTECS: 9999999ZZ

OF FED LAW (49 CFR). FOR ADDNL RECOM, CONSULT

RTECS: 9999999ZZ

BULLETIN SB-2 & OSHA SUBPART H. NFPA 50A COVERS

RTECS: 9999999ZZ

LD50 LC50 Mixture:NONE SPECIFIED BY MANUFACTURER.
Routes of Entry: Inhalation:YES Skin:NO Ingestion:NO
Reports of Carcinogenicity:NTP:NO IARC:NO OSHA:NO
Health Hazards Acute and Chronic:INHAL: HYDROGEN IS SIMPLE ASPHYXIANT.
OXYGEN LEVELS SHOULD BE MAINTAINED AT GREATER THAN 19.5 MOLAR
PERCENT AT NORMAL ATMOSPHERIC PRESSURE. HIGH CONCENTRATIONS OF
HYDROGEN SO AS TO EXCLUDE AN ADEQUATE SUPPLY OF OXYGEN TO LUNGS
CAUSE HEADACHE, DIZZINESS, DEEPER BREATHING DUE TO AIR HUNGER,
POSSIBLE (EFTS OF OVEREXP)
Explanation of Carcinogenicity:NOT RELEVANT
Effects of Overexposure:HLTH HAZ: NAUSEA & EVENTUAL UNCONSCIOUSNESS.
HYDROGEN IS INACTIVE BIOLOGICALLY & ESSENTIALLY NONTOXIC;
THEREFORE, MAJOR HAZARD IS THE EXCLUSION OF AN ADEQUATE SUPPLY OF
OXYGEN TO THE LUNGS. NOTE THAT HYDROGEN IS EXPLOSIVE AT 4% &
ABOVE, SOGENERALLY THE ASPHYXIANT PROPERTIES ARE SECONDARY CONCERN
TO EXPLOSIVE HAZARDS.
Medical Cond Aggravated by Exposure:NONE SPECIFIED BY MANUFACTURER.

First Aid:PROMPT MED ATTN IS MANDATORY IN ALL CASES OF OVEREXP. RESCUE
PERS SHOULD BE EQUIPPED W/NIOSH/MSHA APPRVD SCBA & AWARE OF EXTREME
FIRE & EXPLOS HAZ. RESCUE PERS SHOULD NOT ENTER EXPLO ATM.
INHAL:CONSCI OUS PERS SHOULD BE ASSISTED TO UNCONTAMD AREA & INHALE
FRESH AIR. QUICK REMOVAL FROM CONTAMD AREA IS MOST IMPORTANT. UNCON
PERS SHOULD BE MOVED TO UNCONTAMD AREA, GIVEN ARTF RESUSCITATION &
(ING 9)

Lower Limits:4%
Upper Limits:74.5%
Extinguishing Media:WATER, CARBON DIOXIDE, DRY CHEMICAL. USE WATER
SPRAY TO COOL SURROUNDING EQUIPMENT.
Fire Fighting Procedures:NIOSH/MSHA APPRVD SCBA & FULL PROT EQUIP IF
POSS, STOP FLOW OF HYDROGEN. REDUCE RATE OF FLOW & INJECT INERT
GAS/STEAM, IF POSS, BEFORE COMPLETELY (SUPDAT)
Unusual Fire/Explosion Hazard:VERY FLAMM GAS! ELIM ALL SOURCES OF
IGNIT. HYDROGEN GAS IS VERY LIGHT & RISES VERY RAPIDLY IN AIR. INCR
VENT TO PVNT EXPLOS HAZ, PARTICULARLY IN UPPER (ING 7)

Spill Release Procedures:EVACUATE ALL PERS FROM AFFECTED AREAS. USE
APPROP PROT EQUIP. IF LEAK IS IN USERS' EQUIP, BE CERTAIN TO PURGE
PIPING W/INERT GAS PRIOR TO ATTEMPTING REPAIRS. IF LEAK IS IN CNTNR
OR CNTNR VALVE, CNTCT CHEMTREC FOR EMER ASSISTANCE OR CALL CLOSEST
MFR.
Neutralizing Agent:NONE SPECIFIED BY MANUFACTURER.

Handling and Storage Precautions:USE ONLY IN WELL-VENT AREAS. VALVE
PROT CAPS & INDIVIDUAL CYLS MUST REMAIN IN PLACE UNLESS CNTNR IS
SECURED W/VALVE OUTLET PIPED TO USE PT. (ING 11)
Other Precautions:HYDROGEN IS NON-CORR. HOWEVER HYDROGEN CAN INTERACT
W/SOME METALS (I.E. HARDENED STEELS) TO CAUSE EMBRITTLEMENT.
EARTH-GROUND & BOND ALL EQUIP & SYS ASSOC W/HYDROGEN SYS. ELEC
EQUIP MUST BE NON-SPK OR EXPLOS-PROOF. COMPRESSED GAS (ING 20)

Respiratory Protection:NIOSH/MSHA APPRVD TYPE C RESP W/FULL FACE PIECE
EQUIPPED W/AN ESCAPE BOTTE OR A NIOSH/MSHA APPRVD SCBA SHOULD BE
AVAILABLE FOR EMERGENCY USE. OPERATE THIS EQUIPMENT IN THE POSITIVE
PRESSURE DEMAND MOD E.
Ventilation:LOCAL EXHAUST TO PREVENT ACCUMULATION ABOVE 2% HYDROGEN
(50% OF LOWER EXPLOSIVE LIMIT) & TO AVOID OXYGEN DEFICIENCY.
Protective Gloves:IMPERVIOUS GLOVES .
Eye Protection:ANSI APPRVD CHEM WORKER GOGGLES .
Other Protective Equipment:NONE SPECIFICALLY FOR HYDROGEN.
Work Hygienic Practices:NONE SPECIFIED BY MANUFACTURER.
Supplemental Safety and Health
VP: SUPERCRITICAL. FIRE FIGHT PROC: STOPPING HYDROGEN FLOW (TO HELP
PVNT FLASHBACK). DO NOT EXTING FIRE UNTIL SUPPLY IS SHUT OFF AS
OTHERWISE EXPLO RE-IGNIT MAY OCCUR. NEVER ENTER FLAMM ATM! COOL SUR
ROUNDING CNTNRS W/WATER SPRAY. HYDROGENBURNS W/ALMOST INVISIBLE,
ALMOST SILENT, FLAME OF RELATIVELY LOW THERMAL (ING 2)

HCC:G2
Boiling Pt:B.P. Text:-423F,-253C
Melt/Freeze Pt:M.P/F.P Text:-435F,-259C
Vapor Pres:SUPDAT
Vapor Density:0.069 @ 0C
Spec Gravity:GAS
Solubility in Water:SLIGHT
Appearance and Odor:COLORLESS,FLAMMABLE GAS, COMPRESSED & SHIPPED IN
HIGH PRESS CYLINDERS; ODORLESS

Stability Indicator/Materials to Avoid:YES
OXIDIZERS. FLUORINE & HYDROGEN REACT AT -250C WHEN IMPURITIES PRESENT.
CHLORINE/HYDROGEN MIX ARE STABLE IN DARK (ING 8)
Stability Condition to Avoid:HEAT, SPARK AND OPEN FLAME.
Hazardous Decomposition Products:NONE KNOWN.

Waste Disposal Methods:DISPOSAL MUST BE I/A/W FEDERAL, STATE & LOCAL
REGS . DO NOT ATTEMPT TO DISPOSE OF WASTE OR UNUSED QTYS. RETURN IN
SHIPPING CNTNR PROPERLY LABELED WITH ANY VALVE OUTLET PLUGS OR CAPS
SECURED & VA LVE PROT CAP IN PLACE TO MFR FOR PROPERDISPOSAL.

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.