Product ID:ACETYLENE;ETHYNE
MSDS Date:02/16/1995
FSC:6830
NIIN:00-264-6752
MSDS Number: CBQHM

U S AIRGAS INC.

100 MATSONFORD ROAD SUITE 550
RADNOR, PA 19087
US

Emergency Phone: 800-424-9300(CHEMTREC)

Info Phone: 610-684-5253

Cage: 0MN39

AIRGAS INC

WAYNE, PA 19087 US

Telephone: 215-687-5253

Cage: 0MN39

ACETYLENE

CAS: 74-86-2

RTECS: AO9600000

Fraction By Weight: >99%

ACGIH TLV: ASPHYXIANT; 9596

TRACES OF AIR, PHOSPHINE, ARSINE,HYDROGEN

Fraction By Weight: NP

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:NARCOTIC GAS/INTOXICANT CAUSES
HYPERCAPNIA(EXCESSIVE AMT OF CO2 IN BLOOD).REPEATED EXPO TO
TOLERANCE LEVES HASN'T SHOWN DELETERIOUS EFECTS.MAJ PROP:EXCLUSION
OF ADEQUATE OXY SUPPLY TO LUNGS.INHAL:SIMP LE
ASPHYXIANT/NARCOTIC.SKIN/EYE:NO ADVERSE EFFECTS HAVE BEEN REPO FRM
PURE GAS.INGEST:NOT LIKELY.
Explanation of Carcinogenicity:PER MSDS:CARCINOGEN STATUS:NONE.
Effects of Overexposure:ACETYLENE LEVEL OF 2.5% NONTOXIC.10%
LEVEL:REVERS NARCOSIS.20%:DYSPNEA,HEAD,STAG GAI.30%:LOSS OF
COORDINATION.33-35%:UNCONSC.UP TO 80%:COMPLETE ANESTHESIA,INCR
BLOOD PRESS,NARC,STIMULATED RESP.MILD GA STRIC SYMPT,DIZZ,MENTAL
CONFUS,EMOTIONAL INSTABILITY,HYPERCAPNIA,MYOCARDIAL
SENS,ASPHYXIATION,RAPID RESP,AIR HUNGER,ETC.
Medical Cond Aggravated by Exposure:PERSONS IN ILL HEALTH WHERE SUCH
ILLNESS WOULD BE AGGRAVATED BY EXPO TO ACETYLENE SHOULD NOT BE
ALLOWED TO WORK W/OR HNDL PROD. TRAGET EFFECTS:SIMPLE
ASPHYXIANT;CNS DEPRESS.

First Aid:INHAL:REMOVE TO FRESH AIR IMMED.STOP BREATH GIVE ART
RESP.TREAT SYMPT/SUPP.ADMIN OXY IF AVIALABLE BY QUAL PERSON.GET MED
ATTN IMMED.SKIN/EYE/INGEST:UNLIKELY EMERG TREAT WILL BE
REQUIRED.ADVERSE EFFECT S OCCUR WASH SKIN W/LG AMTS OF
WATER/SOAP;WASH EYE W/WATER/NORMAL SALINE;INGEST-TREAT
SYMPT/SUPP;IN ALL CASES GET MED ATTN.NO SPECIFIC ANTIDOTE.TREAT
SYMPTOMATICALLY/SUPPORTIVELY.

Flash Point:NOT PROVIDED
Autoignition Temp:Autoignition Temp Text:581F
Lower Limits:2.5
Upper Limits:100
Extinguishing Media:DRY CHEMICAL,CARBON DIOXIDE,HALON. LG FIRES:USE
WATER SPRAY,FOG OR STD FOAM.
Fire Fighting Procedures:MOVE CNTNR FRM FIRE AREA.STAY AWAY FRM STORAGE
TK ENDS.MASSIVE FIRE IN STORAGE AREA USE UNMANNED HOSE
HOLDER/MONITOR NOZZ ELSE W/D FRM AREA,LET FIRE BURN.(SUPP)
Unusual Fire/Explosion Hazard:DANGEROUS EXPLOSION HAZ WHEN EXPO TO
HEAT/FLAME.VAP/AIR MIXTURES EXPLO.DUE TO MATL LOW
ELECTROCONDUCTIVITY FLOW/AGITTION MAY GENERATE ELECTROSTATIC
CHARGES(SUP)

Spill Release Procedures:SHUT OFF IGN SOURCES.STOP LEAK W/O RISK.USE
WATERSPRAY TO REDUCE VAP.ISOLATE AREA TIL GAS HAS DISPERSED.NO
SMOKEING/FLAMES/FLARES IN HAZ AREA.KEEP UNNECESSARY PEOPLE
AWAY;ISOLATE/DENY ENTRY.VENTI CLSD SPACES BEF ENTERING.
Neutralizing Agent:NONE SPECIFIED BY MANUFACTURER.

Handling and Storage Precautions:OBSERVE ALL FED/STATE/LOC REGS WHEN
STORING PROD.FOR ASSIST CONTACT DISTRICT DIR OF EPA.STORE IAW
29CFR1910.102.PROTECT AGAINST PHYS DMG.STORE UPRIGHT
Other Precautions:OUTSIDE/DETACHED STORAGE PREF.ISOLATE FROM OXIDZI
GASES ESPECIALLY CL2.STORE IN COOL WELL VENTI NONCOMBUST PLACE AWAY
FROM ALL POSSIBLE IGN SOURCES/COMBUST MATLS.PROTECT AGAINST
LIGHTING/STATIC ELECT. CNTNRS MEET BOND/GROUND NFPA 77-1983.

Respiratory Protection:SPEC RESP SELECTED MSUT BE BASED ON CONTAMIN
LEVELS IN WORKPLACE,NOT EXCEED WORKING LEIMITS OF RESP,APPROVED BY
NIOSH/MSHA.
Ventilation:PROVIDE LOC EXHAUST OR GENERAL DILUTION VENTILATION.
VENTILATION EQPMT MUST BE EXPLOSION-PROOF.
Protective Gloves:PROT GLOVES NOT REQUIRED BUT RECOMMENDED
Eye Protection:SAF GLASS/GOGG ADVISABLE.
Other Protective Equipment:IMPERVIOUS LCOTHING NOT REQUIRED.
Work Hygienic Practices:NONE SPECIFIED BY MANUFACTURER.
Supplemental Safety and Health
FIREFIGHT:W/D IMMED IN CASE OF RISING SOUND FRM VENTING SAF
DEVICE/DISCOLOR OF STORAGE TK FRM FIRE.LET STORAGE VESS BURN UNLESS
LEAK CAN BE STOP.SM TK/CYL EXT/ISOLATE FRM OTHER FLAMM MATL.USE H2O
IN F LOOD AMTS AS FOG.COOL CNTNR W/FLOOD AMTS OF H2O. FIRE/EXPLO
HAZ:RESULTING IN SPARKS W/POSSIBLE IGN.

HCC:G2
Boiling Pt:B.P. Text:NP
Melt/Freeze Pt:M.P/F.P Text:-119F,-84C
Decomp Temp:Decomp Text:NP
Vapor Pres:760 @-84C
Vapor Density:1.1747 @0C
Spec Gravity:0.610 @-81C
pH:NP
Viscosity:NP
Evaporation Rate & Reference:NP
Solubility in Water:0.94 @25C, SLIGHT
Appearance and Odor:COLORLESS GAS WTIH ETHEREAL ODOR WHEN PURE,
GARLIC-LIKE ODOR IF IMPURE.
Percent Volatiles by Volume:NP
Corrosion Rate:NP

BR2;BRASS
W/>65%CU;CL2;CO;CU/SALTS;FL2;I2;HG/SALTS;HNO3;NO;OZONE;OX2;OXIDIZER
S;MOLTEN K;AG/SALTS;AGNO3;NAH;RBH.
Stability Condition to Avoid:MAY DECOMPO EXPLO @ELEVATED
TEMP/PRESS.AVOID CONTACT W/HEAT/SPARK/FLAMES/IGN SOURCES.AVOID
LINE/SYS PRESS >15PSIG.
Hazardous Decomposition Products:THERMAL DECOMPOSITION PRODUCTS MAY
INCLUDE TOXIC OXIDES OF CARBON.
Conditions to Avoid Polymerization:MAY POLYMERIZE EXOTHERMICALLY ON
CONTACT W/APPROPRIATE CATALYSTS.

Waste Disposal Methods:OBSERVE ALL FED/STATE/LOC REGS WHEN DISPO
SUBSTANCE.FOR ASSIST CONTACT DISTRICT DIR OF EPA.

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.