Product ID:HELIUM-4 ATOMIC HELIUM
MSDS Date:10/01/1995
FSC:6830
NIIN:00N044264
MSDS Number: CFNWB

AIRGAS

SUITE 550, 100 MATSONFORD RD
RADNOR, PA 19087-4579
US

Emergency Phone: 800-424-9300

Info Phone: 610-687-5253

Cage: AIRGA

AIRGAS INC

WAYNE, PA 19087 US

Telephone: 215-687-5253

Cage: 0MN39

WILL REQ EMER TREATMENT. IF CONT W/LIQUEFIED/HIGH

RTECS: 9999999ZZ

IT IS UNLIKELY

RTECS: 9999999ZZ

OCCUR, TREAT SYMPTOMATICALLY & SUPPORTIVELY & GET

RTECS: 9999999ZZ

WHICH ARE REMOTE FROM PERSONNEL, WORK

RTECS: 9999999ZZ

ANY NIOSH APPRVD SCBA. FOR FIREFIGHTING & OTHER

RTECS: 9999999ZZ

W/FULL FACEPIECE OPERATED IN PRESS-DEMAND OR OTHER

RTECS: 9999999ZZ

RESP W/FULL FACEPIECE & OPERATED IN

RTECS: 9999999ZZ

AUXILIARY SCBA OPERATED IN PRESSURE-DEMAND/OTHER

RTECS: 9999999ZZ

HELIUM

CAS: 7440-59-7

RTECS: MH6520000

Fraction By Weight: <99.9%

OSHA PEL N/K

ACGIH TLV: N/K

OXYGEN

CAS: 7782-44-7

RTECS: RS2060000

Fraction By Weight: <0.1%

OSHA PEL C 0.05 PPM

ACGIH TLV: C 0.05 PPM

NITROGEN

CAS: 7727-37-9

RTECS: QW9700000

Fraction By Weight: 0.1%

OSHA PEL N/K

ACGIH TLV: ASPHYXIANT

NEON

CAS: 7440-01-9

RTECS: QP4450000

Fraction By Weight: O.1%

OSHA PEL N/K

ACGIH TLV: ASPHYXIANT

SUITABLE FOR TYPE OF FIRE. COOL CNTNRS W/FLOODING

RTECS: 9999999ZZ

PROGRESSES, NAUS, VOMIT, COLLAPSE, UNCON,

RTECS: 9999999ZZ

ADVERSE EFTS HAVE BEEN RPTD FROM GAS. CONT

RTECS: 9999999ZZ

OR NUMBNESS. IN MORE SEV CASES, SKIN MAY BECOME HARD

RTECS: 9999999ZZ

BEEN RPTD FROM GAS. CONT W/CRYOGENIC LIQ MAY CAUSE

RTECS: 9999999ZZ

INGEST OF GAS IN UNLIKELY. IF LIQ IS SWALLOWED,

RTECS: 9999999ZZ

GET MED ATTN. IN CASE OF CONT W/CRYOGENIC

RTECS: 9999999ZZ

AT TEMP NOT >107F. IF WATER IS NOT AVAIL/IMPRACTICAL

RTECS: 9999999ZZ

ENCOURAGE VICTIM TO EXERCISE AFFECTED PART WHILE IT

RTECS: 9999999ZZ

IT IS UNLIKELY

RTECS: 9999999ZZ

LD50 LC50 Mixture:NONE SPECIFIED BY MANUFACTURER.
Routes of Entry: Inhalation:YES Skin:YES Ingestion:YES
Reports of Carcinogenicity:NTP:NO IARC:NO OSHA:NO
Health Hazards Acute and Chronic:ACUTE: INHAL: INHAL OF MIX OF HELIUM &
AIR/HELIUM & OXYG MAY CAUSE DISTORTED SPEECH, INCR LOSS OF BODY
HEAT, & GAS EMBOLI @ JUNCTION OF SKIN & SUBCUTANEOUS FAT/BODY FAT &
BLOOD VESS. SEE INFO ON SIMPL E ASPHYXIANTS. SIMPLE ASPHYXIANTS:
ACUTE: SYMPS OF ASPHXIA DEPEND ON RAPIDITY W/WHICH OXYG DEFICIENCY
(EFTS OF OVEREXP)
Explanation of Carcinogenicity:NOT RELEVANT.
Effects of Overexposure:HLTH HAZ: DEVELOPS & HOW LONG IT CONTINUES. IN
SUDDEN ACUTE ASPHYXIA, UNCON MAY BE IMMED. W/SLOW DEVELOPMENT THERE
MAY BE RAPID RESPIRATION & PULSE, AIR HUNGER, DIZZ, REDUCED
AWARENESS, TIGHTNESS IN H EAD, TINGLING SENSATION, INCOORDINATION,
FAULTY JUDGEMENT, EMOTIONAL INSTABILITY, & RAPID FATIGUE. AS
ASPHYXIA (ING 6)
Medical Cond Aggravated by Exposure:NONE SPECIFIED BY MANUFACTURER.

First Aid:INHAL:IMMED REMOVE TO FRESH AIR. IF BRTHG HAS STOPPED, GIVE
ARTF RESP. MAINTAIN AIRWAY & BLOOD PRESS & ADMIN OXYG IF AVAIL.
KEEP AFFECTED PERSON WARM & @ REST. TREAT SYMPTOMATICALLY &
SUPPORTIVELY. AD MIN OF OXYG SHOULD BE PERFORMED BY QUALIFIED PERS.
GET MED ATTN IMMED. SKIN:WHERE CONT W/GAS @ AMBIENT TEMP IS
INVOLVED, IT IS UNLIKELY THAT EMER TREATMENT WILL BE REQD. IF
ADVERSE EFTS OCCUR,(ING 11)

Extinguishing Media:DRY CHEM, CO*2/HALON. LARGER FIRES, USE WATER
SPRAY, FOG/STD FOAM(1993 EMER RESPONSE GUIDEBOOK, DOT-RSPA P
5800.6).
Fire Fighting Procedures:NIOSH APPRVD SCBA & FULL PROT EQUIP . MOVE
CNTNR FROM FIRE AREA IF POSS. STAY AWAY FROM STOR TANK ENDS. COOL
FIRE-EXPOSED CNTNRS W/WATER FROM (SUPDAT)
Unusual Fire/Explosion Hazard:NEGLIGIBLE FIRE HAZARD WHEN EXPOSED TO
HEAT/FLAME. CYLINDER MAY EXPLODE IN HEAT OF FIRE.

Spill Release Procedures:STOP LEAK IF CAN BE DONE W/OUT RISK. KEEP
UNNECESSARY PEOPLE AWAY; ISOLATE HAZARD AREA AND DENY ENTRY.
VETILATE CLOSED SPACES BEFORE ENTERING.
Neutralizing Agent:NONE SPECIFIED BY MANUFACTURER.

Handling and Storage Precautions:OBSERVE ALL FEDERAL, STATE & LOCAL
REGS WHEN STORING/DISPOSING OF THIS SUBSTANCE. STORE IN ACCORDANCE
W/29 CFR 1910.101.
Other Precautions:FOR ASSISTANCE, CONTACT DISTRICT DIRECTOR OF THE
ENVIRONMENTAL PROTECTION AGENCY. DO NOT PERMIT PHYSICAL
DMG/OVERHEATING OF CNTNRS. CONTENTS ARE UNDER PRESS; CNTNRS MAY
VIOLENTLY RUPTURE & TRAVEL CONS IDERABLE DISTANCE.

Respiratory Protection:THE FOLLOWING RESPS ARE REC BASED ON INFO FOUND
IN PHYSICAL DATA, TOX & HLTH EFTS SECTIONS. THEY ARE RANKED IN
ORDER FROM MINIUM TO MAXIMUM RESP PROT. ANY NIOSH APPRVD
SUPPLIED-AIR RESP OPERATED IN PR ESS-DEMAND/OTHER POS PRESS
MODE.(ING 19)
Ventilation:PROVIDE GENERAL DILUTION VENTILATION.
Protective Gloves:COLD INSULATING GLOVES.
Eye Protection:ANSI APPRVD CHEM WORKERS GOGGLES .
Other Protective Equipment:ANSI APPRVD EYE WASH & DELUGE SHOWER . CONT
W/LIQ FORM WEAR APPROP PROT CLTHG & EQUIP TO PVNT SKIN FROM
FREEZING.
Work Hygienic Practices:CONTACT LENSES SHOULD NOT BE WORN.
Supplemental Safety and Health
SPEC GRAV (GAS):0.138 @ 70F, 1 ATM. VAP DENS (GAS):0.1650 G/L @ 70F, 1
ATM. FIRE FIGHT PROC:SIDE UNTIL WELL AFTER FIRE IS OUT. W/DRAW
IMMED IF RISING SOUND FROM VENTING SFTY DEVICE IS HEARD/ANY DISCOL
ORATION OF STOR TANKS DUE TO FIRE. (1993 EMER RESPONSE GUIDEBOOK,
DOT-RSPA P 5800.6, GUIDE NUMBER 12). USE AGENTS(ING 5)

Boiling Pt:B.P. Text:-452F,-269C
Melt/Freeze Pt:M.P/F.P Text:NONE
Vapor Density:SUPDAT
Spec Gravity:SUPDAT
Evaporation Rate & Reference:NOT KNOWN
Solubility in Water:0.0094 @ 0C
Appearance and Odor:NONFLAMMABLE, ODORLESS, COLORLESS, TASTELESS, INERT
GAS.

Stability Indicator/Materials to Avoid:YES
NOT APPLICABLE.
Stability Condition to Avoid:NONE SPECIFIED BY MANUFACTURER.
Hazardous Decomposition Products:NOT APPLICABLE.

Waste Disposal Methods:DISPOSAL MUST BE I/A/W FEDERAL, STATE & LOCAL
REGULATIONS . VENT HELIUM GAS SLOWLY TO WELL-VENTILATED OUTDOOR
LOCATION REMOTE FROM PERS, WORK AREAS, & BUILDING AIR INTAKES.
ALLOW LIQ HELIUM TO E VAP IN WELL-VENTILATED OUTDOOR LOCATIONS (ING
18)

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.