Product ID:ACETYLENE, ETHYNE, ETHINE
MSDS Date:06/01/1990
FSC:6830
NIIN:00F002382
MSDS Number: BBKVV

Emergency Phone: 215-481-4911

Info Phone: 215-481-4911 OR FAX 215-481-5900

Cage: 00742

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

Cage: 00742

ACETYLENE

CAS: 74-86-2

RTECS: AO9600000

OSHA PEL 2500 PPM

ACGIH TLV: SIMPLE ASPHYXIANT

Routes of Entry: Inhalation:YES Skin:NO Ingestion:NO
Reports of Carcinogenicity:NTP:NO IARC:NO OSHA:NO
Health Hazards Acute and Chronic:ACETYLENE IS A SIMPLE ASPHYXIANT,
IRRITANT & ANESTHETIC. ABOUT 100 MG PER LITER MAY BE TOLERATED FOR
0.5-1.0 HOUR. THERE IS NO EXPERIMENTAL EVIDENCE OF CHRONIC HARMFUL
EFFECTS.
Explanation of Carcinogenicity:NONE
Effects of Overexposure:HEADACHES, DIZZINESS, SHORTNESS OF BREATH &
LOSS OF CONSCIOUSNESS MAY OCCUR IF THE GAS IS PRESENT IN QUANTITIES
SUFFICIENT TO DILUTE THE OXYGEN CONCENTRATION IN AIR. SYMPTOMS OF
ANOXIA OCCUR ONLY WHEN THE GAS 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 SECOND &
THIRD DEGREE BURNS SHOULD BE COVERED IN THE CLEANEST MATERIAL
AVAILABLE. PER SONS SUFFERING FROM LACK OF OXYGEN SHOULD BE MOVED
TO AREAS W/NORMAL ATMOSPHERE. ASSISTED RESPIRATION & SUPPLEMENTAL
OXYGEN SHOULD BE GIVEN IF THE VICTIM IS NOT BREATHING. OBTAIN MED
ATTN IN ALL CASES

Flash Point Method:CC
Flash Point:0F/-18C
Lower Limits:2.5%
Upper Limits:100%
Extinguishing Media:CO2, DRY CHEMICAL, HALON
Fire Fighting Procedures:STOP GLAS FLOW & FIGHT FIRE CONVENTIONALLY.
USE WATER SPRAY TO KEEP CYLINDERS & OTHER CONTAINERS COOL IF
EXPOSED TO FIRE. KEEP PERSONNEL AWAY.
Unusual Fire/Explosion Hazard:FLAMMABLE/EXPLOSIVE. MAY DECOMPOSE
VIOLENTLY IN ITS FREE STATE UNDER PRESSURE >15 PSIG. BURNS W/HOT
FLAME. IGNITES EASILY DUE TO LOW MINIMUM IGNITION ENERGY.

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

Handling and Storage Precautions:USE ONLY IN WELL VENTILATED AREAS.
HANDLE CYLINDERS W/CARE. USE A PRESSURE REDUCING REGULATOR SET AT
LESS THAN 15 PSIG. NEVER EXPOSE TO HEAT.
Other Precautions:ALWAYS KEEP CYLINDERS UPRIGHT & SECURE CYLINDERS WHEN
IN USE. ALWAYS OPEN & CLOSE ACETYLENE VALVES SLOWLY. RETURN
CYLINDERS W/POSITIVE PRESSURE & CYLINDER VALVE CLOSED. AVOID
DRAGGING/ROLLING/SLIDING CYLINDERS, EVEN A SHORT DISTANCE. SUPP.

Respiratory Protection:OXYGEN DEFICIENT ATMOSPHERES ARE IN THE
FLAMMABLE RANGE. DON'T ENTER. AIR PURIFYING RESPIRATORS WILL NOT
FUNCTION.
Ventilation:LOCAL EXHAUST/MECHANICAL (GENERAL): AS NECESSARY.
MECHANICAL MUST MEET NATL ELEC CODE REQUIREMENTS FOR CLASS 1, GROUP
A
Protective Gloves:LEATHER, WELDERS
Eye Protection:SAFETY GLASSES, WELDER GOGGLES
Other Protective Equipment:LEATHER SLEEVES, LEATHER APRON & OTHER
STANDARD PROTECTIVE EQUIPMENT FOR CUTTING & WELDING.
Supplemental Safety and Health
USE A HAND TRUCK. STORAGE OF 2500 CUBIC FEET OR LESS IS PERMISSIBLE
WITHIN BLDGS. STORAGE IN EXCESS OF 2500 CUBIC FEET MUST BE OUTDOORS
OR IN WELL VENTILATED SPECIAL ROOMS OR BLDGS. DON'T STORE IN HEA VY
TRAFFIC AREAS. VALVE CAPS SHOULD REMAIN ON CYLIDNERS NOT CONNECTED
FOR USE. SEGREGATE FULL & EMPTY CYLINDERS.

Boiling Pt:B.P. Text:-119F/-84C
Melt/Freeze Pt:M.P/F.P Text:-113F/-81C
Vapor Pres:590 PSIA
Vapor Density:0.0681
Spec Gravity:0.906
Appearance and Odor:PURE ACETYLENE IS COLORLESS/ODORLESS.

Stability Indicator/Materials to Avoid:NO
OXYGEN & HALOGENS. COPPER/BRASS/COPPER SALTS/MERCURY/MERCURY
SALTS/POTASSIUM/SILVER/SILVER SALTS & NITRIC ACID.
Stability Condition to Avoid:AVOID MECHANICAL SHOCKS TO CONTAINER OF
ACETYLENE. NEVER EXPOSE CYLINDER OR ACETYLENE SYSTEMS TO SOURCES OF
HEAT.
Hazardous Decomposition Products:ACETYLENE WILL DECOMPOSE INTO
ELEMENTAL CARBON & HYDROGEN.

Waste Disposal Methods:DO NOT ATTEMPT TO DISPOSE OF RESIDUAL GAS IN
CYLINDERS. RETURN CYLINDERS TO AIR PRODUCTS FOR DISPOSAL. FLAMMABLE
GAS. UN 1001.

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