Product ID:ACETYLENE ETHYNE
MSDS Date:01/01/1991
FSC:6830
NIIN:00-264-6751
MSDS Number: BHDFK

Emergency Phone: 800-866-4422/800-424-9300(CHEMTREC)

Info Phone: 704-333-5475(X308)/FAX 344-1711

Preparer: NONE

Cage: 18264

Telephone: 804-627-5673

Cage: 0SSR7

ACETYLENE

CAS: 74-86-2

RTECS: AO9600000

Fraction By Weight: 100%

ACGIH TLV: ASPHYXIANT; 9394

LD50 LC50 Mixture:ORAL LD50 (RAT) IS UNKNOWN.
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 DEFINED AS A SIMPLE
ASPHYXIANT. OXYGEN LEVELS SHOULD BE MAINTAINED AT GREATER THAN 18
MOLAR PERCENT AT NORMAL ATMOSPHERIC PRESSURE WHICH IS EQUIVALENT TO
A PARTIAL PRESSURE OF 135 MM HG.
Explanation of Carcinogenicity:NONE
Effects of Overexposure:INHALATION: LOW CONCENTRATIONS (10-20% IN AIR)
CAUSE SYMPTOMS SIMILAR TO THAT OF BEING INTOXICATED. HIGHER
CONCENTRATIONS THAT EXCLUDES AN ADEQUATE SUPPLY OF OXYGEN TO THE
LUNGS CAUSES UNCONSCIOUSNESS .
Medical Cond Aggravated by Exposure:NONE SPECIFIED BY MANUFACTURER.

First Aid:PROMPT MEDICAL ATTENTION IS MANDATORY IN ALL CASES OF
OVEREXPOSURE TO ACETYLENE. RESCUE PERSONNEL SHOULD BE EQUIPPED WITH
SELF-CONTAINED BREATHING APPARATUS INHALATION: QUICK REMOVAL TO
FRESH AIR IS M OST IMPORTANT. UNCONSCIOUS PERSON SHOULD BE GIVEN
MOUTH TO MOUTH RESUSCITATION AND SUPPLEMENTAL OXYGEN. FURTHER
TREATMENT SHOULD BE SYMPTOMATIC AND SUPPORTIVE.

Flash Point:FLAMMABLE GAS
Autoignition Temp:Autoignition Temp Text:565F
Lower Limits:2.2
Upper Limits:80-85
Extinguishing Media:CARBON DIOXIDE, DRY CHEMICAL.
Fire Fighting Procedures:IF POSSIBLE, STOP FLOW OF ESCAPING GAS. USE
WATER SPRAY TO COOL SURROUNDING CONTAINERS. HEATED OR BURNING
CYLINDERS CAN RUPTURE VIOLENTLY.
Unusual Fire/Explosion Hazard:ACETYLENE IS SPONTAEOUSLY COMBUSTIBLE IN
AIR AT PRESSURES ABOVE 30 PSIA. DENSITY OF ACETYLENE IS VERY
SIMILAR TO AIR,WHEN LEAKING IT DOES NOT READILY DISSIPATE.

Spill Release Procedures:EVACUATE ALL PERSONNEL FROM AFFECTED AREA. IF
LEAK IS IN USER'S EQUIPMENT, PURGE PIPING WITH INERT GAS PRIOR TO
ATTEMPTING REPAIRS. IF LEAK IS IN CONTAINER OR CONTAINER VALVE,
CONTACT YOUR CLOSEST SUP PLIER OR CALL LISTED EMERGENCY TELEPHONE
NUMBER.
Neutralizing Agent:NONE SPECIFIED BY MANUFACTURER.

Handling and Storage Precautions:STORE IN COOL,DRY,WELL VENTILATED AREA
AWAY FROM HEAVILY TRAFFICKED AREAS AND EXITS.KEEP AREA TEMPERATURES
BELOW 130F.SEGREGATE FULL AND EMPTY UNITS.
Other Precautions:STORE CYLINDERS UPRIGHT AND FIRMLY SECURED TO PREVENT
FALLING. MOVE CYLINDERS WITH SUITABLE HAND TRUCK. NO SOURCE OF
IGNITION IN STORAGE OR USE AREAS. KEEP PROTECTION CAPS IN PLACE
UNLESS CONTAINER IS SECURED AND PIPED TO USE POINT.

Respiratory Protection:POSITIVE PRESSURE AIR LINE WITH MASK OR
SELF-CONTAINED BREATHING APPARATUS SHOULD BE AVAILABLE FOR
EMERGENCY USE.
Ventilation:HOOD WITH FORCED VENTILATION RECOMMENDED. PROVIDE ADEQUATE
LOCAL EXHAUST AND MECHANICAL TO PREVENT BUILDUP ABOVE LEL.
Protective Gloves:PVC OR RUBBER IN LABORATORY.
Eye Protection:SAFETY GOGGLES/GLASSES.
Other Protective Equipment:SAFETY SHOES, SAFETY SHOWER.
Work Hygienic Practices:NONE SPECIFIED BY MANUFACTURER.
Supplemental Safety and Health
EARTH-GROUND AND BOND LINES AND EQUIPMENT USED IN ACETYLENE SYSTEM.
ELECTRICAL EQUIPMENT SHOULD BE NON-SPARKING OR EXPLOSION PROOF.
COMPRESSED GAS CYLINDERS SHOULD BE REFILLED BY QUALIFIED PRODUCERS
O F COMPRESSED GASES. USE "FIRST-IN FIRST-OUT" INVENTORY SYSTEM.
POST "NO SMOKING OR OPEN FLAMES" IN STORAGE AND USE AREA.

HCC:G2
Boiling Pt:B.P. Text:SUBLI=-119F
Melt/Freeze Pt:M.P/F.P Text:-113F,-81C
Vapor Pres:645 PSIA
Vapor Density:0.906
Spec Gravity:0.62
Evaporation Rate & Reference:NA
Solubility in Water:SOLUBLE
Appearance and Odor:PURE: COLORLESS GAS. ETHEREAL ODOR. COMMERCIAL:
COLORLESS GAS. GARLIC-LIKE ODOR
Percent Volatiles by Volume:100

Stability Indicator/Materials to Avoid:NO
OXYGEN, OXIDIZERS, HALOGENS, HALOGEN COMPOUNDS. FORMS EXLOSIVE WITH
COPPER, MERCURY, SILVER, BRASSES, BRAZING MATERIALS.
Stability Condition to Avoid:DO NOT ALLOW FREE GAS (OUTSIDE OF
CYLINDER) TO EXCEED 30 PSIA.DO NOT EXPOSE CYLINDERS TO SUDDEN SHOCK
OR SOURCES OF HEAT
Hazardous Decomposition Products:CARBON AND HYDROGEN.

Waste Disposal Methods:DO NOT ATTEMPT TO DISPOSE OF WASTE OR UNUSED
PRODUCT. RETURN IN SHIPPING CONTAINER PROPERLY LABELED, WITH VALVE
OUTLET PLUGS/CAPS SECURED AND VALVE PROTECTION CAP IN PLACE, TO
YOUR SUPPLIER. FOR EMERG ENCY DISPOSAL ASSISTANCE CONTACT LOCAL
SUPPLIER.

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.