Product ID:ACETYLENE, ETHYNE, ETHINE
MSDS Date:07/10/1986
FSC:6830
NIIN:00-286-5434
MSDS Number: BHDHK

Emergency Phone: 1-800-322-9092

Info Phone: 215-481-4911

Cage: 00742

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

Cage: 5H199

ACETYLENE

CAS: 74-86-2

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, AND ANESTHETIC. ABOUT 100MG PER LITERMAY BE
TOLERATED FOR 0.5-1.0 HOUR. THERE IS NO EXPERIMENTAL EVIDENCE OF
CHRONIC HARMFUL EFFECTS.
Explanation of Carcinogenicity:ACETYLENE IS CLASSIFIED AS A SIMPLE
ASPHYXIANT AND HAS NO THRESHOLD LIMIT VALUE.
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. SYMPTOMS OF ANOXIA
OCCUR ONLY WHEN THE G AS CONCENTRATIONS ARE WITHIN THE FLAMMBLRANGE
AND THE MIXTURE HAS NOT IGNITED.

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

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
*SOLUBLITY IN WATER: 64F 18C 1 ATM 1.0 CUFT/CUFTH2O
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.
Unusual Fire/Explosion Hazard:ACETYLENE IS EXTREMELY
FLAMMABLE/EXPLOSIVE. IT MAY DECOMPOSE VIOLENTLY IN ITS FREE STATE
UNDER PRESS IN EXCESS OF 15PSIG.IT BURNS W/INTENSELY HOT FLAMES.

Spill Release Procedures:VENTILATE AREA TO PREVENT FLAMMABLE MIXTURE
FROM FORMING.REMOVE SOURCES OF IGNITION,HEAT,SPARKS,ETCAVOID
ENTERING AREA OF FLAMMABLE ATMOSPHERE. CARE FULLY REMOVE CYLINDERS
W/SLW LEAKS TO A REMOTE OUT DOORS LOCATION.CONTACT AIR PRODUCTS
FORASSISTANCE

Handling and Storage Precautions:USE A PRESSURE REDUCING REGULATOR SET
AT <15PSIG. STORE IN NON HEAVY TRAFFIC AREA TO PREVENT
DAMAGE.SEGREGATE FULL & EMPTY CYLINDERS.
Other Precautions:ACETYLENE CYLINDERS SHOULD BE STORED AND USED IN AN
UPRIGHT POSITION. AVOID HAZARDOUS MIXTURES AND SOURCES OF
IGNITION.

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. MECHNL
VENTILATNFOR ENCLSD AREAS MUST MEET NEC REQUIRMNTS FOR CLS 1, GRP A
Protective Gloves:LEATHER WORK GLOVES/WELDER GLOVES
Eye Protection:SAFETY GLASSES/WELDERS GOGGLES
Other Protective Equipment:LEATHER SLEEVES, LEATHER APRON & OTHER
STANDARD PROTECTIVE EQUIPMENT FOR CUTTING/WELDING.
Supplemental Safety and Health
NK

Boiling Pt:B.P. Text:-119.2F-84C
Vapor Pres:*SEE BELOW
Vapor Density:*SEE BELOW
Spec Gravity:-116F/-82C
Solubility in Water:*SEE BELOW
Appearance and Odor:PURE ACETYLENE IS COLORLESS & ODORLESS. IMPURITIES
IN ACETYLENE GARLIC LIKE ODO

Stability Indicator/Materials to Avoid:NO
OXIDIZERS SUCH AS OXYGEN & HALOGENS.FORMS EXPLOSIVE COMPNDS
W/COPPER,BRASS,COPPER SALTS,HG & HG SALTS,K,AG,&AG SALTS,HNO
Stability Condition to Avoid:AVOID MECHANICAL SHOCKS TO CONTAINERS OF
ACETYLENE.NEVER EXPOSE CYLINDERS OR ACETYLEN SYSTEMS TO SOURCE
OF HEAT.
Hazardous Decomposition Products:ACETYLEN WILL DECOMPOSE INTO ELEMENTAL
CARBON & HYDROGEN UNDER THE ABOVE CONDITIONS
Conditions to Avoid Polymerization:*VAPOR DENSITY: 68F 20C, 1 ATM
0.0681 *VAPOR PRESSURE: 62.2F 16.8C 590 PSIA
40ATM

Waste Disposal Methods:DO NOT ATTEMPT TO DISPOSE OF RESIDUAL 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.