Product ID:ACETYLENE, ETHYNE, ETHINE
MSDS Date:07/10/1986
FSC:6830
NIIN:00-290-4370
MSDS Number: BHDJH

Emergency Phone: 1-800-322-9092

Info Phone: 215-481-4911

Cage: 00742

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

Cage: 5H199

ACETYLENE, ETHYNE, ETHINE

CAS: 74-86-2

Routes of Entry: Inhalation:YES Skin:YES Ingestion:NO
Reports of Carcinogenicity:NTP:NO IARC:NO OSHA:NO
Health Hazards Acute and Chronic:DO NOT ENTER AREAS WITHIN THE
FLAMMABLE RANGE DUE TO THE IMMEDIATE FIRE AND EXPLHAZARD.
ACETYLENE IS A SIMPLE ASPHYXIANT, IRRITANT, AND ANESTHETIC.
Effects of Overexposure:SYMPTOMS SUCH AS HEADACHES, DIZZINESS,
SHORTNESS OF BREATH, & LOSS OF CONSCIOUS-NESS MAY OCCUR IF THE GAS
IS PRESENT IN QUANTITIES SUFFICIENT TO DILUTE THE OXY CONCENTRATION
IN AIR. SYMPTOMS OF ANOXIA OCCUR ONLY WHEN THE GAS
CONCENTRATIONSARE WITH THE FLAMMABLE RANGE AND THE MIXTURE HAS NOT
IGNITED.

First Aid:FIRST DEGREE & MINOR SECOND DEGREE THERMAL BURNS FROM FIRES
SHOULD BE IMMERSED IN COOL WATER FOR 30 MIN. MAJOR SEC & THIRD
DEGREE BURNS SHOULD BE COVERED IN THE CLEANEST MATERIAL AVAIL.
SEEK IMMEDI ATE PHYSICIAN AID. PERSONS SUFFERINGFROM LACK OF OXY
SHOULD BE MOVED TO AREAS WITH NORMAL ATMOS. CPR SHOULD BE GIVENIF
VICTIM IS NOT BREATHING.

Flash Point Method:CC
Flash Point:0F/-18C
Autoignition Temp:Autoignition Temp Text:581F
Lower Limits:2.5%
Upper Limits:100%
Extinguishing Media:CARBON DIOXIDE, DRY CHEMICAL, HALON
Fire Fighting Procedures:WITHOUT RISK, MOVE CYLINDERS AWAY FROM FIRE
AREA. FROM A SAFE DISTANCE, COOL SURROUDING CYLINDERS WITH WATER
SPRAY UNTIL WELL AFTER FIRE IS OUT.STOP GAS FLOW.
Unusual Fire/Explosion Hazard:CYLINDERS EXPOSED TO FIRE OR INTENSE HEAT
MAY VENT RAPIDLY OR EXPLODE. IGNITES VERY EASILY.VERY WIDE
FLAMMABLE LIMITS. BURNS WITH 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 ATMOS. CARE-FULLY REMOVE CYLINDERS WITH
SLOW LEAKS TO A REMOTE OUTDOOR LOCATION.CONTACT AIR PRODUCTS FOR
ASSISTAN

Handling and Storage Precautions:USE IN WELL VENTILATED AREA.KEEP
ACETYLENE CYLINDEUPRIGHT & SECURE. NEVER EXPOSE TO HEAT. SEGREGATE
FULL/EMPLY CYL. ALWAYS OPEN/CLOSE VALVES SLOWLY.
Other Precautions:AVOID EXPOSURE TO AREAS WHERE SALT OR OTHER CORROSIVE
CHEMICALS ARE PRESENT.KEEPACETYLENE CYL. STORAGE AREAS AWAY FROM
STORAGE OF OXY & OTHER OXIDIZERS. AVOID HAZARDOUS MIXTURES &
SOURCES OF IGNITION .DO NOT REFILL COMPRESSED GAS CYLINDERS.

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
Protective Gloves:LEATHER:WELDER GLOVES FOR WELD OPERATION
Eye Protection:SAFETY GLASSES:WELDER GOGGLES FOR WELDIN
Other Protective Equipment:LEATHER SLEEVES, LEATHER APRON AND OTHER
STANDARD PROTECTIVEEQUIPMENT FOR CUTTING AND WELDING.
Supplemental Safety and Health
MECHANICAL VENTILATION FOR ENCLOSED STORAGE AREAS MUST MEET NATIONAL
ELECTRICAL CODE REQUIREMENTS FOR CLASS1, GROUP A. FORMATION OF
EXPLOSIVE COPPER ACETYLIDESCAN BE AVOIDED BY USING COPPER ALLOYS PR
OVED SUCCESSFUL THROUGH USE IN INDUSTRY.

Boiling Pt:B.P. Text:-119F/-84C
Vapor Pres:*SEE BELOW
Vapor Density:*SEE BELOW
Spec Gravity:68F20C1ATM0.906
Solubility in Water:1ATM 1. CUFT/CUFTH20
Appearance and Odor:PURE ACETYLENE IS COLORLESS AND ODORLESS.
IMPURITIES GENERATE GARLIC-LIKE ODOR.

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

Waste Disposal Methods:DO NOT ATTEMPT TO DISPOSE OF RESIDUAL GASEOUS
ACETYLENE IN CYLINDERS. RETURN TO AIR PRODUCTS INCFOR 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.