Product ID:ACETYLENE, ETHYNE, ETHINE
MSDS Date:07/10/1986
FSC:6830
NIIN:00-264-6752
MSDS Number: BHDFM

Cage: 00742

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

Cage: 5H199

ACETYLENE

CAS: 74-86-2

Routes of Entry: Inhalation:YES Skin:NO Ingestion:NO
Reports of Carcinogenicity:NTP:NO IARC:NO OSHA:NO
Explanation of Carcinogenicity:ACETYLENE IS CLASSIFIED AS A SIMPLE
ASPHYXIANT AND HAS NO TLV.
Effects of Overexposure:HEADACHES, DIZZINESS, SHORTNESS OF BREATH, AND
LOSS OF CONSCIOUSNESS MAY OCCUR IF THE GAS IS PRESENT IN
QUANTITIES TO DILUTE THE OXYGEN CONCENTRATION IN AIR. SYMPTOMS OF
ANOXIA OCCUR ONLY WHEN THE G AS CONCENTRATIONS ARE WITHIN THE
FLAMMABLE RANGE & THE MIXTURE HAS NOT IGNITED.

First Aid:FIRST DEGREE & MINOR SECOND DEGREE THERMAL BURNS FROM FIRES
SHOULD BE IMMERSED IN COOL WATER FOR 30 MINUTES.MAJOR BURNS SHOULD
BE COVERED IN CLEANEST MATERIAL AVAILABLE. SEEK IMMEDIATE AID OF
PHYSICI AN.PERSONS SUFFERING FROM LACK OF OXYGENSHOULD BE MOVED TO
AREAS W/NORMAL ATMOSPHERE. ASSISTED RESPIRATION AND SUPPLEMENTAL
OXYGEN SHOULD BE GIVEN IF VICTIM IS NOT BREATHING.

Flash Point Method:CC
Flash Point:OF / -18C
Autoignition Temp:Autoignition Temp Text:***
Lower Limits:100
Upper Limits:2.5
Extinguishing Media:CARBON DIOXIDE, DRY CHEMICAL, HALON
Fire Fighting Procedures:STOP GAS FLOW/FIGHT FIRE CONVENTIONALLY. USE
WATER SPRAY TO KEEP CYLINDERS/OTHERCONTAINERS COOL IF EXPOSED TO
FIRE.KEEP PERSONNEL AWAY SINCE CONTNR CAN RUPTURE.
Unusual Fire/Explosion Hazard:IT BURNS W/INTENSELY HOT FLAME.POTENTIAL
EXPLOSION HAZARD EXISTS FROM REIGNITIONIF FIRE IS EXTING. W/O
SHUTTING OFF ACETYLENE SOURCE.

Spill Release Procedures:VENTILATE AREA TO PREVENT FLAMMABLE MIXTURE
FROM FORMING. REMOVE SOURCES OF IGNITION,HEAT,SPARKS, ETC.
CAREFULLY REMOVE CYLINDERS W/SLOW LEAK TO A REMOTE OUTDOOR
LOCATION. AVOID ENTERING AREA OF FLAMMABLE ATMOSPHERE.

Handling and Storage Precautions:USE SUITABLE HANDTRUCK.ALWAYS
OPEN/CLOSE ACETYLENEVALVES SLOWLY.KEEP CYLINDERS AWAY FROM HEAT
SOURCESTORAGE SHOULD NOT BE IN HEAVY TRAFFIC AREAS.
Other Precautions:SEGREGATE FULL & EMPTY CYLINDERS. KEEP ACETYLENE
CYLINDERS STORAGE AREAS AWAY FROM OXYGEN AND OTHER OXIDIZERS.
AVOID DRAGGING,ROLLING,OR SLIDING CYLINDERS. AVOID EXPOSURE TO
AREAS WHERE SALT OR OT HER CORROSIVE CHEMICAL ARE PRESENT.

Respiratory Protection:OXYGEN DEFICIENT ATMOSPHERES ARE IN THE
FLAMMABLE RANGE. DO NOT ENTER!! RESPIRATORS WILL NOT
FUNCTION.
Ventilation:NATURAL OR MECHANICAL WHERE GAS IS PRESENT. MECHANICAL
VENTILATION FOR ENCLSD AREA MUST MEET NEC REQMENTS FOR CL1,GRP4.
Protective Gloves:LEATHER WORK GLOVES/WELDERS WORK GLOVES
Eye Protection:SAFETY GLASSES/WELDERS GOGGLES
Other Protective Equipment:LEATHER SLEEVES, LEATHER APRON AND OTHER
STANDARD PROTECTIVEEQUIPMENT FOR CUTTING AND WELDING.
Supplemental Safety and Health
NK

Boiling Pt:B.P. Text:**SEE BELOW
Vapor Pres:590 PSIA
Vapor Density:1 ATM.0681
Spec Gravity:1 ATM 0.906
Solubility in Water:1ATM1.0CUFT/CUFTH2O
Appearance and Odor:PURE: COLORLESS & ODORLESS; IMPURITIES IMPART A
CHARACTERISTIC GARLIC LIKE ODOR

Stability Indicator/Materials to Avoid:NO
OXYGEN & HALOGENS. FORMS EXPLOSIVE COMPOUNDS W/COPPER,BRASS,COPPER
SALTS, HG & HG SALTS,AG & AG SALTS, & HNO3.
Stability Condition to Avoid:NEVER UTILIZE FREE GAS OUTSIDE CYLINDER AT
PRESS. <15PSIG. AVOID MECH. SHOUCKS TO CONTNR.NEVER EXPOSE
CYLINDER TO HEAT.
Hazardous Decomposition Products:ACETYLENE WILL DECOMPOSE INTO
ELEMENTAL CARBON AND HYDROGEN UNDER THE ABOVE CONDITIONS.

Waste Disposal Methods:DO NOT ATTEMPT TO DISPOSE OF RESIFUAL GASEOUS
ACETYLENE IN CYLINDERS. RETURN TO AIR PRODUCTS FOR DISPOSAL.

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.