Product ID:ACETYLENE, ETHYNE, ETHINE
MSDS Date:07/10/1986
FSC:6830
NIIN:00-765-0156
MSDS Number: BHDVS

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 WITHIN THE FLAMMABLE RANGE AND THE MIXTURE HAS
NOT IGNITED.
Medical Cond Aggravated by Exposure:ACETYLENE IS A SIMPLE ASPHYXIANT,
IRRITANT, AND ANESTHETIC.ABOUT 100MG PER LITER MAY BE TOLERATED
FOR .5 - 1 HR. THERE IS NO EXPERIMENTAL EVIDENCE OF CHRONIC
HARMFUL EFFECTS.

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 THECLEANEST MATERIAL AVAIL.SEEK
IMMED. PHYS ICIAN AID. PERSONS SUFFERING FROM LACKOF OXY SHOULD BE
MOVED TO NORMAL ATMOS. AREA. CPR SHOULD BE GIVEN IF THE VICTIM IS
NOT BREATHING.

Flash Point Method:CC
Flash Point:0F(-18C)
Autoignition Temp:Autoignition Temp Text:581F
Lower Limits:100%
Upper Limits:2.5%
Extinguishing Media:CARBON DIOXIDE, DRY CHEMICAL, HALON
*SOLUBILITY IN WATER: 64F/18C, 1ATM 1.0 CUFT/CUFTH20
Fire Fighting Procedures:STOP GAS FLOW. USE WATER SPRAY TO KEEP
CYLINDERS OR OTHER CONTAINERS COOL. KEEPALL CLEAR SINCE CONTAINERS
CAN RUPTURE VIOLENTLY. SEE CGA SAFETY BULLETIN SB-4.
Unusual Fire/Explosion Hazard:ACETYLENE IS EXTREMELY FLAMMABLE &
EXPLOSIVE.IT BURNS WITH INTENSELY HOT FLAME. WIDE FLAMMABLE LIMITS.
IGNITES EASILY. STAYS IN POCKETS RATHER THAN DISSIPATE.

Spill Release Procedures:VENTILATE AREA TO PREVENT FLAMMABLE MIXTURE
FROM FORMING.REMOVE SOURCES OF IGNITION, HEAT, SPARKS, ETC. AVOID
ENTERING AREA OF FLAMMABLE ATMOSPHERE. CAREFULLY REMOVE CYLINDERS
WITH SLOW LEAKS TO A RE MOTE OUTDOOR AREA.CONTACT AIR PROCUCTS FOR
ASSIST.

Handling and Storage Precautions:USE IN WELL VENTILATE AREA.ALWAYS KEEP
CYL. SECURE& UPRIGHT.OPEN/CLOSE VALVES SLOWLY.SEE CGA PAMP P1KEEP
AWAY FROM HEAT. SEGREGATE FULL/EMPTY CYLINDER
Other Precautions:AVOID HAZARDOUS MIXTURES AND SOURCES OF IGNITION.
COMPRESSED GAS CYL. SHOULDN'TBE REFILLED EXCEPT BY QUALIFIED
PRODUCERS OF COMPRESSED GAS. AVOID EXSPOSURE TO AREAS WHERE SALT OR
OTHER CORROSIVE CHEM ICALS ARE PRESENT.

Respiratory Protection:OXYGEN-DEFICIENT ATMOSPHERES ARE IN THE
FLAMMABLE RANDE. DO NOT ENTER! RESPIRATORS WILL NOT
FUNCTION.
Ventilation:NATURAL OR MECHANICAL WHERE GAS IS PRESENT.
Protective Gloves:LEATHER:WELDING GLOVES FOR WELD OPERATIO
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 CLASS 1, GROUP A. AVOID HAZARDOUS
MIXTURES AND SOURCES OF IGNITION.FORMATION OF EXPLOSIVE COPPER A
CETYLIDES CAN BE AVOIDED BY USING COPPERALLOYS PROVED 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:*SEE BELOW
Appearance and Odor:PURE ACETYLENE IS COLORLESS & ODORLESS. IMPURITIES
GENERATE GARLIC-LIKE ODOR.

Stability Indicator/Materials to Avoid:NO
OXYDIZERS SUCH AS OXYGEN & HALOGENS.FORMS EXPLOSIVE COMPOUNDWITH
COPPER,BRASS,COPPER SALTS,HG&HG SALTS,K,AG&AG SALTS,HNO
Stability Condition to Avoid:NEVER UTILIZE FREE GAS OUTSIDE CYL. NEVER
EXPOSE TO HEAT. AVOID MECHANICAL SHOCKS TO CONTAINERS OF
ACETYLENE.
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 CYLINDERS. RETURN TO AIR PRODUCTS FORDISPOSAL.

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.