U S AIRGAS -- ACETYLENE - ACETYLENE,TECHNICAL 
MATERIAL SAFETY DATA SHEET
NSN: 6830002865434
Manufacturer's CAGE: 0MN39 
Part No. Indicator: A 
Part Number/Trade Name: ACETYLENE 
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                            General Information
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Item Name: ACETYLENE,TECHNICAL 
Company's Name: U S AIRGAS INC. 
Company's Street: 100 MATSONFORD ROAD SUITE 550 
Company's City: RADNOR 
Company's State: PA 
Company's Country: US 
Company's Zip Code: 19087 
Company's Emerg Ph #: 215-687-1052 
Company's Info Ph #: 215-687-5253 
Record No. For Safety Entry: 002 
Tot Safety Entries This Stk#: 008 
Status: SE 
Date MSDS Prepared: 01MAY90 
Safety Data Review Date: 03MAY97 
Supply Item Manager: 75 
MSDS Serial Number: CDMMK 
Specification Number: BB-A-106 
Spec Type, Grade, Class: B GRADE 
Hazard Characteristic Code: G2 
Unit Of Issue: CY 
Unit Of Issue Container Qty: 10 CU FT 
Type Of Container: 00-285-4733 
Net Unit Weight: 388 LB GROS 
NRC/State License Number: NONE 
Net Propellant Weight-Ammo: NONE 
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                     Ingredients/Identity Information
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Proprietary: NO 
Ingredient: ACETYLENE
Ingredient Sequence Number: 01 
Percent: 100 
NIOSH (RTECS) Number: AO9600000 
CAS Number: 74-86-2 
OSHA PEL: NOT ESTABLISHED 
ACGIH TLV: ASPHYXIANT; 9495 
Other Recommended Limit: NK 
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                     Physical/Chemical Characteristics
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Appearance And Odor: PURE ACETYLENE IS COLORLESS-ETHEREAL ODOR.COMMERCIAL
ACETYLENE GARLIC-LIKE ODOR
Boiling Point: -119F,-84C 
Melting Point: -113F,-81C 
Vapor Pressure (MM Hg/70 F): 645 PSIA 
Vapor Density (Air=1): 0.UNKNOWN 
Specific Gravity: UNKNOWN 
Decomposition Temperature: UNKNOWN 
Evaporation Rate And Ref: N/A. 
Solubility In Water: SOLUBLE 
Viscosity: UNKNOWN 
Corrosion Rate (IPY): UNKNOWN 
Autoignition Temperature: 565F 
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                      Fire and Explosion Hazard Data
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Flash Point: FLAMMABLE GAS 
Lower Explosive Limit: 2.2 
Upper Explosive Limit: 80 - 85 
Extinguishing Media: USE CARBON DIOXIDE, DRY CHEMICAL. COOL FIRE-EXPOSED
CONTAINERS WITH WATER SPRAY.
Special Fire Fighting Proc: IF POSSIBLE, STOP FLOW OF GAS. USE WATER TO
COOL SURROUNDING CONTAINERS. KEEP PERSONNEL AWAY SINCE HEATED OR BURNING
CYLINDERS CAN RUPTURE VIOLENTLY.
Unusual Fire And Expl Hazrds: ACETYLENE IS SPONTANEOUSLY COMBUSTIBLE IN
AIR AT PRESSURE >30PSIA. FIRES WHICH HAVE BEEN EXTINGUISHED W/O STOPPING
FLOW OF GAS CAN EASILY REIGNITE & EXPLODE.
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                              Reactivity Data
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Stability: NO 
Cond To Avoid (Stability): DO NOT ALLOW FREE GAS TP EXCEED 30 PSIA. DO NOT
EXPOSE CYLINDERS TO SUDDEN SHOCK OR SOURCES OF HEAT.
Materials To Avoid: OXYGEN & OTHER OXIDIZERS INCLUDING ALL HALOGENS &
HALOGEN COMPOUNDS. FORMS EXPLOSIVE METAL ACETYLIDES
Hazardous Decomp Products: CARBON & HYDROGEN
Hazardous Poly Occur: NO 
Conditions To Avoid (Poly): WILL NOT OCCUR.
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                            Health Hazard Data
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LD50-LC50 Mixture: PRODUCT'S LD50 (ORAL RAT) WAS NOT STATED 
Route Of Entry - Inhalation: YES 
Route Of Entry - Skin: NO 
Route Of Entry - Ingestion: NO 
Health Haz Acute And Chronic: ACETYLENE IS A SIMPLE ASPHYXIANT. MAINTAIN
OXYGEN LEVELS OF >18 MOLAR PERCENT.
Carcinogenicity - NTP: NO 
Carcinogenicity - IARC: NO 
Carcinogenicity - OSHA: NO 
Explanation Carcinogenicity: NOT LISTED BY IARC, NTP OR OSHA AS A
CARDINOGEN OR POTENTIAL CARCINOGEN.
Signs/Symptoms Of Overexp: ACETYLENE IS A SIMPLE ASPHYXIANT. LOW
CONCENTRATION MAY CAUSE INTOXICATION. HIGHER CONCENTRATION CAN CAUSE
UNCONSCIOUSNESS. AS A NARCOTIC GAS OR INTOXICANT CAUSES HYPERCAPNIA
(INCREASED CO2 IN BLOOD).
Med Cond Aggravated By Exp: PERSONS IN ILL HEALTH WHERE SUCH ILLNESS WOULD
BE AGGRAVATED BY EXPOSURE TO ACETYLENE SHOULD NOT BE ALLOWED TO WORK WITH
OR HANDLE THIS PRODUCT.
Emergency/First Aid Proc: PROMPT MEDICAL ATTENTION IS MANDATORY IN ALL
CASES OF OVEREXPOSURE TO ACETYLENE.RESCUE PERSONNEL SHOULD BE EQUIPPED WITH
SELF-CONTAINED BREATHING APPARATUS & BE AWARE OF EXTREME FIRE & EXPLOSION
HAZARD.REMOVE FROM EXPOSURE QUICKLY.PROVIDE CPR/OXYGEN IF UNCONSCIOUS.TREAT
SYMPTOMATICALLY & SUPPORTIVELY.
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                   Precautions for Safe Handling and Use
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Steps If Matl Released/Spill: VENTILATE AREA. USE APPROPRIATE PROTECTIVE
EQUIPMENT. REMOVE ALL SOURCES OF IGNITION. AVOID ENTERING AREA OF FLAMMABLE
ATMOSPHERE. IF LEAK IS IN USER'S EQUIPMENT, PURGE PIPING WITH AN INERT GAS.
IF LEAK IS IN CONTAINER/VALVE, CONTACT NEAREST SUPPLIER
Neutralizing Agent: MFR GAVE NO INFORMATION OF MSDS.
Waste Disposal Method: DO NOT ATTEMPT TO DISPOSE OF WASTE OR UNUSED
QUANTITIES. RETURN IN THE SHIPPING CONTAINER PROPERLY LABELED, WITH ANY
VALVE OUTLET PLUGS OR CAPS SECURED & VALVE PROTECTION CAP IN PLACE TO YOUR
SUPPLIER OR CALL THE EMERGENCY TELEPHONE NUMBER.
Precautions-Handling/Storing: STORE IN COOL,DRY,WELL-VENTILATED AREA.KEEP
CYLINDERS UPRIGHT & FIRMLY SECURED.
Other Precautions: USE "FIRST IN-FIRST OUT" INVENTORY SYSTEM. POST "NO
SMOKING/OPEN FLAMES" SIGN IN THE STORAGE AREA. THERE SHOULD BE NO SOURCES
OF IGNITION IN STORAGE/USE AREA. DO NOT ALLOW THE TEMPERATURE WHERE
CYLINDERS ARE STORED TO EXCEED 130F (54C).
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                             Control Measures
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Respiratory Protection: POSITIVE PRESSURE AIR LINE WITH MASK OR SELF-
CONTAINED BREATHING APPARATUS SHOULD BE AVAILABLE FOR EMERGENCY USE.
Ventilation: LOCAL & MECHANICAL
Protective Gloves: PVC OR RUBBER 
Eye Protection: SAFETY GLASSES/GOGGLES 
Other Protective Equipment: SAFETY SHOES, EMERGENCY SHOWER
Work Hygienic Practices: WASH THOROUGHLY AFTER HANDLING.
Suppl. Safety & Health Data: NONE
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                            Transportation Data
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Trans Data Review Date:   98030 
DOT PSN Code: ADR 
DOT Proper Shipping Name: ACETYLENE, DISSOLVED
DOT Class: 2.1 
DOT ID Number: UN1001 
DOT Label: FLAMMABLE GAS 
IMO PSN Code: EQB 
IMO Proper Shipping Name: COMPRESSED GAS, FLAMMABLE, N.O.S. o
IMO Regulations Page Number: 2124 
IMO UN Number: 1954 
IMO UN Class: 2(2.1) 
IMO Subsidiary Risk Label: - 
IATA PSN Code: AFJ 
IATA UN ID Number: 1001 
IATA Proper Shipping Name: ACETYLENE, DISSOLVED
IATA UN Class: 2.1 
IATA Label: FLAMMABLE GAS 
AFI PSN Code: HDE 
AFI Symbols: * 
AFI Prop. Shipping Name: COMPRESSED GAS, FLAMMABLE, N.O.S.
AFI Class: 2.1 
AFI ID Number: UN1954 
AFI Special Prov: P4 
AFI Basic Pac Ref: A6.3, A6.5 
MMAC Code: NK 
N.O.S. Shipping Name: ACETYLENE
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                               Disposal Data
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                                Label Data
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Label Required: YES 
Technical Review Date: 03MAY97 
MFR Label Number: NONE 
Label Status: F 
Common Name: ACETYLENE 
Chronic Hazard: NO 
Signal Word: DANGER! 
Acute Health Hazard-Moderate: X 
Contact Hazard-Slight: X 
Fire Hazard-Severe: X 
Reactivity Hazard-None: X 
Special Hazard Precautions: ACETYLENE IS A SIMPLE ASPHYXIANT. MAINTAIN
OXYGEN LEVELS OF >18 MOLAR PERCENT. STORE IN COOL,DRY,WELL-VENTILATED AREA.
KEEP CYLINDERS UPRIGHT & FIRMLY SECURED.
Protect Eye: Y 
Protect Skin: Y 
Label Name: U S AIRGAS INC. 
Label Street: 100 MATSONFORD ROAD SUITE 550 
Label P.O. Box: ?????? 
Label City: RADNOR 
Label State: PA 
Label Zip Code: 19087 
Label Country: US 
Label Emergency Number: 215-687-1052 
Year Procured: 1997