Product ID:ACETYLENE, ETHYNE, ETHINE
MSDS Date:06/01/1990
FSC:6830
NIIN:00-292-0138
MSDS Number: BJRDR

Emergency Phone: 800-523-9374/800-322-9092(IN PA)

Info Phone: 215-481-4911

Cage: 00742

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

Cage: 00742

ACETYLENE

CAS: 74-86-2

RTECS: AO9600000

ACGIH TLV: ASPHYXIANT; 9394

Routes of Entry: Inhalation:YES Skin:YES Ingestion:NO
Reports of Carcinogenicity:NTP:NO IARC:NO OSHA:NO
Health Hazards Acute and Chronic:ACETYLENE:SIMPLE
ASPHYXIANT,IRRIT,ANESTHETIC.NO EXPERIMENTAL DATA OF CHRONIC HARMFUL
EFFECTS.HEAD,DIZZ,SHORTNESS OF BREATH,LOSS OF CONSC IF PRESENT IN
AMTS SUFFICIENT TO DILUTE OXY CONC.ANOXIA OCCUR W HEN CONC W/IN
FLAMM RANGE & NOT IGNITED.
Explanation of Carcinogenicity:PER MSDS:NOT LISTED AS CARCINOGEN BY
NTP/IARC/OSHA.
Effects of Overexposure:ASPHYXIANAT, IRRITANT, ANESTHETIC. HEADACHE,
DIZZINESS, SHORTNESS OF BREATH, LOSS OF CONSCIOUSNESS. ANOXIA.
Medical Cond Aggravated by Exposure:NONE SPECIFIED BY MANUFACTURER.

First Aid:1ST DEG/MINOR DEGREEE THERMAL BURNS FROM FIRES SHOULD BE
IMMERSED IN COOL WATER 30MINS.MAJOR 2ND/3RD DEGREE BURNS SHOULD BE
COVERED IN CLEANEST MATL AVAILABLE.SEEK IMMED AID OF
PHSYICIAN.PERSONS SUFFE RING FROM LACK OF OXY SHOULD BE MOVED TO
AREAS W/NORMAL ATM.ASSISTED RESP & SUPPLEMENTAL OXY SHOULD BE GIVEN
IF VICTIM NOT BREATHING.

Flash Point Method:CC
Flash Point:0F,-18C
Autoignition Temp:Autoignition Temp Text:581F
Lower Limits:2.5 @1ATM
Upper Limits:100 @1ATM
Extinguishing Media:CARBON DIXOIDE, DRY CHEMICAL, HALON. (NOTE HALON IS
AN ODS.) ELECTRICLA CLASSIFICATION:CLASS I, GROUP A.
Fire Fighting Procedures:STOP GAS FLOW.FIGHT FIRE CONVENTIONALLY.KEEP
FIRE-EXPO CNTNR/CYL W/WATERSPRAY.KEEP PEOPLE WELL AWAY SINCE CNTNRS
CAN RUPTURE VIOLENTLY.
Unusual Fire/Explosion Hazard:EXTREMELY FLAMM/EXPLO.MAY DECOMPOSE VIO
IN FREE STATE UNDER PRESSURE >15PSIG.BURNS W/INTENSELY HOT
FLAME.POT EXPLO HAZ FRM REIGN IF FIRE EXT W/O GAS OFF.(SUPP)

Spill Release Procedures:VENTILATE AREA-PREVENTS FLAMM MIXTURES.REMOVE
IGN SOURCE/HEAT/SPARKS/ETC.AVOID ENTERING AREA OF FLAMM
ATM.CAREFULLY REMOVE CYL W/SLOW LEAKS TO REMOTE,OUTDOOR
LOCATION.CONTACT AIR PRODUCTS FOR ASSISTAN CE.
Neutralizing Agent:NONE SPECIFIED BY MANUFACTURER.

Handling and Storage Precautions:DO NOT ENTER AREAS W/IN FLAMM RANGE
DUE TO IMMED FIRE/EXPLO HAZ.USE IN WELL VENTI AREAS.GAS UNDER
PRESSURE-HANDLE W/CARE,USE REDUCING REG @,15PSIG.
Other Precautions:USE SUITABLE FLAMM GAS METER(EXPLOSIMETER)CALIBRATED
FOR H2C2 TO MEASURE CONC OF GAS IN AIR.SEE COMPRESSED GAS ASSOC SAF
BULLETIN SB-4.OPEN/CLS GY SLOWLY.USE SUITABLE HAND TRUCK.KEEP AWAY
FROM HEAT/IG N SOURCE/ETC.FOLLOW ALL SAF CYL PRACTICE

Respiratory Protection:OXYGEN-DEFICIENT ATMOSPHERS ARE IN THE FLAMMABLE
RANGE. DO NOT ENTER. AIR PRUIFYING RESPIRATORS WILL NOT FUNCTION.
Ventilation:NATURAL/MECH WHERE GAS IS PRESENT.LOC
EXHAU/MECH(GEN)/OTHER:AS NECESSARY.MECH VENTI FOR ENCLSD STROAGE
AREAS MUST (SUPP)
Protective Gloves:LEATHER-CYL HANDLE;WELDERS-WELD/CUTTING
Eye Protection:SAFT GLASS;WELDER GOGG, ETC FOR WELDING
Other Protective Equipment:LEATHER SLEEVES & APRON,OTHER STD PROT EQMPT
FOR CUTING/WELDING.
Work Hygienic Practices:CONSULT COMPRESSED GAS ASSOC PAMPHLET P-1 &
NFPA STD #51.
Supplemental Safety and Health
FIRE/EXPLO HAZ:IGNITES VERY EASILY DUE TO LOW MIN IGN ENERGY;VERY WIDE
FLAMM LIMITS.ACETYLENE GAS HAS APPROXIMATE SPEC GRAVITY OF 1.0 &
TENDS TO STAY IN POCKETS RATHER THAN DISSIPATE. VENTI:MEET NAT E
LECTRICAL CODE REQMTS FOR CLASS 1 GROUPA.

HCC:G2
Boiling Pt:B.P. Text:-119F,-84C
Melt/Freeze Pt:M.P/F.P Text:-113F,-81C
Vapor Pres:62F @16.8C
Vapor Density:0.0681
Spec Gravity:0.906 @20C
Appearance and Odor:PURE C2H2 COLORLESS/ODORLESS.IMPURITIES IN CARBIDE
GENERATED C2H2 GARLIC ODOR.

Stability Indicator/Materials to Avoid:NO
OXIDIZERS(OXY,HALOGENS);FORMS EXPLO CMPDS W/COPPER,BRASS,COPPER
SALTS,MERCURY,MERCURY SALTS,K,SILVER,SILVER SALTS,HNO3.
Stability Condition to Avoid:NEVER UTILIZE FREE GAS OUTSIDE CYL @PRESS
>15PSIG.AVOID MECHANICAL SHOCKS TO CNTNR.NEVER EXPO CYL/GAS SYS TO
HEAT SOURCE
Hazardous Decomposition Products:ACETYLENE WILL DECOMPOSE INTO
ELEMENTAL CARBON & HYDROGEN UNDER THE ABOVE CONDITIONS.

Waste Disposal Methods:DO NOT ATTEMPT TO DISPOSE OF RESIDUAL GAS IN
CYLINDERS. RETURN CYLINDERS TO AIR PRODUCTS FOR DISPOSAL. ACETYLENE
PACKED IN DOT SPECIFICATIONS 8 OR 8AL CYL W/POROUS FILLER STURATED
W/ACETONE. FULL CYL SHOULD NOT EXCEED 250PSIG @70F.

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assume responsibility for the suitability of this information to their
particular situation.