Product ID:ACETYLENE, ETHYNE, ETHINE
MSDS Date:07/10/1986
FSC:6830
NIIN:00-765-0150
MSDS Number: BHDVR

Cage: 00742

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

Cage: 5H199

ACETYLENE

CAS: 74-86-2

RTECS: AO9600000

ACGIH TLV: ASPHYXIANT; 9192

Routes of Entry: Inhalation:YES Skin:YES Ingestion:YES
Reports of Carcinogenicity:NTP:NO IARC:NO OSHA:NO
Health Hazards Acute and Chronic:ACETYLENE IS A SIMPLE
ASPHYXIANT,IRRITANT,& ANESTHETIC.ABOUT 100MG PER LITER MAYBE
TOLERATED FOR 0.5-1.0 HOUR.THERE IS NO EXPERIMENTAL EVIDENCE OF
CHRONIC HARMFUL EFFECTS.
Effects of Overexposure:SYMPTOMS SUCH AS HEADACHES,DIZZINESS,SHORTNESS
OF BREATH, & LOSS OF CONSCIOUSNESS MAY OCCUR IN OXYGEN-DEFICIENT
AREA.SYMPTOMS OF ANOXIA OCCUR ONLY WHEN THE GAS CONCENTRATIONS ARE
W/IN FLAMMABLE RANGE & THE MIXTURE HAS NOT IGNITED.USE A SUITABLE
FLAMMABLE GAS METER CALIBRATED FOR ACETYLENE TO MEASURE GAS IN THE
AIR.

First Aid:FIRST DEGREE & MINOR SECOND DEGREE THERMAL BURNS FROM FIRES
SHOULD BE IMMERSED IN COOL WATER FOR 30 MINS.MAJOR SECOND & THIRD
DEGREE BURNS SHOULD BE COVERED IN THE CLEANEST MATERIAL
AVAILABLE.SEEK IMM EDIATE AID OF A PHYSICIAN.PERSONS SUFFERING FROM
LACK OF OXYGEN SHOULD BE MOVED TO AREA W/NORMAL ATMOSPHERE.ASSISTED
RESPIRATION & SUPPLEMENTAL OXYGEN SHOULD BE GIVEN IF THE VICTIM IS
NOT BREATHING.

Flash Point:0F -18C (CC)
Lower Limits:100%
Upper Limits:2.5%
Extinguishing Media:CARBON DIOXIDE, DRY CHEMICAL, HALON
Fire Fighting Procedures:STOP GAS FLOW & FIGHT FIRE CONVENTIONALLY.USE
WTR APRAY TO KEEP CYLS OR OTHER CONTAINERS COOL IF EXPOSED TO
FIRE.KEEP PERSONNEL WELL AWAY CONTAINERS CAN RUPTURE
Unusual Fire/Explosion Hazard:ACETYLENE IS EXTREMELY FLAMMABLE &
EXPLOSIVE.IT MAY DECOMPOSE VIOLENTLY IN ITS FREE STATE UNDER
PRESSURE IN EXCESS OF 15 PSIG.IT BURNS W/INTENSELY HOT FLAME.

Spill Release Procedures:VENTILATE AREA TO PREVENT FLAMMABLE MIXTURE
FROM FORMING.REMOVE SOURCES OF IGNITION,HEAT,SPARKS,ETC.AVOID
ENTERING AREA OF FLAMMABLE ATMOSPHERE.CARE- FULLY REMOVE CYLS
W/SLOW LEAKS TO A REMOTE OUTDOOR LOCATION.CONTACT AIR PRODUCTS FOR
ASSISTANCE.

Handling and Storage Precautions:USE/STORE ONLY IN WELL VENTILATED
AREAS.NEVER EXPOSE ACETYLENE CYL TO HEAT.USE A SUITABLE HAND
TRUCK/SEGREGATE FULL/EMPTY CYLS.
Other Precautions:ACETYLENE CYLS SHOULD BE STORED & USED IN AN UPRIGHT
POSITION.WHEN USING ACETYLENE,CLOSE THE CYL VALVE BEFORE SHUTTING
OFF THE REGULATOR TO PERMIT THE GAS TO BLEED FROM THE
REGULATOR.AVOID HAZARDOUS M IXTURES & SOURCES OF IGNITION.

Respiratory Protection:OXYGEN-DEFICIENT ATMOSPHERES ARE IN THE
FLAMMABLE RANGE.DO NOT ENTER.RESPIRATOR WILL NOT FUNCTION.
Ventilation:NATURAL/MECHANICAL WHERE GAS IS PRESENT.
Protective Gloves:LEATHER GLOVES/WELDER GLOVES
Eye Protection:SAFETY GLASSES/WELDERS GOGGLES
Other Protective Equipment:LEATHER SLEEVES, LEATHER APRON & STANDARD
PROTECTIVE EQUIP FOR CUTTING & WELDING.
Supplemental Safety and Health
VENTILATION:MECHANICAL VENTILATION FOR ENCLOSED STORAGE AREAS MUST MEET
NATIONAL ELECTRICAL CODE REQUIREMENTS FOR CLASS 1,GROUP A.

Boiling Pt:B.P. Text:-119.2F
Vapor Pres:@62.5F
Vapor Density:@68F 20C
Spec Gravity:@68F 20C
Solubility in Water:@64F 18C
Appearance and Odor:PURE ACETYLENE IS COLORLESS & ODORLESS.CARBIDE
GENERATED ACETYLENE GARLIC ODOR.

Stability Indicator/Materials to Avoid:NO
OXIDIZERS SUCH AS OXYGEN,& HALOGENS.FORMS EXPLOSIVE COMPOUNDS
W/CPR,BRASS,CPR SALTS,HG & HG SALTS,K,AG & AG SALTS,& HNO3
Stability Condition to Avoid:AVOID MECHANICAL SHOCKS TO CONTAINERS OF
ACETYLENE.NEVER EXPOSE CYLS OR ACETYLENE SYSTEMS TO SOURCES OF
HEAT.
Hazardous Decomposition Products:ACETYLENE WILL DECOMPOSE INTO
ELEMENTAL CARBON & HYDROGEN UNDER THE ABOVE CONDITIONS.

Waste Disposal Methods:DO NOT ATTEMPT TO DISPOSE OF RESIDUAL GASEOUS
ACETYLENE IN CYLS.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.