Valid 05/2001 - 07/2001

Aldrich Chemical Co., Inc.
1001 West St. Paul
Milwaukee, WI 53233 USA
Tel: 414-273-3850





             M A T E R I A L  S A F E T Y  D A T A  S H E E T
             
SECTION 1. - - - - - - - - - CHEMICAL IDENTIFICATION- - - - - - - - - -
    CATALOG #:            294985
    NAME:                 ALLENE, 97%
SECTION 2. - - - - - COMPOSITION/INFORMATION ON INGREDIENTS - - - - - -
    CAS #:   463-49-0
    MF: C3H4
    EC NO:  207-335-3
SECTION 3. - - - - - - - - - - HAZARDS IDENTIFICATION - - - - - - - - -
  LABEL PRECAUTIONARY STATEMENTS
    FLAMMABLE (USA)
    HIGHLY FLAMMABLE (EU)
    DANGER: FLAMMABLE HIGH-PRESSURE GAS.
    KEEP AWAY FROM SOURCES OF IGNITION - NO SMOKING.
    TAKE PRECAUTIONARY MEASURES AGAINST STATIC DISCHARGES.
    IN CASE OF INSUFFICIENT VENTILATION, WEAR SUITABLE
    RESPIRATORY EQUIPMENT.
    CYLINDER TEMPERATURE SHOULD NOT EXCEED 125 F(52 C).
    DO NOT PUNCTURE OR INCINERATE THIS CYLINDER.
SECTION 4. - - - - - - - - - - FIRST-AID MEASURES- - - - - - - - - - -
    IN CASE OF CONTACT, IMMEDIATELY FLUSH EYES WITH COPIOUS AMOUNTS OF
    WATER FOR AT LEAST 15 MINUTES.
    IN CASE OF CONTACT, IMMEDIATELY WASH SKIN WITH SOAP AND COPIOUS
    AMOUNTS OF WATER.
    IF INHALED, REMOVE TO FRESH AIR. IF NOT BREATHING GIVE ARTIFICIAL
    RESPIRATION. IF BREATHING IS DIFFICULT, GIVE OXYGEN.
    IF SWALLOWED, WASH OUT MOUTH WITH WATER PROVIDED PERSON IS CONSCIOUS.
    CALL A PHYSICIAN.
SECTION 5. - - - - - - - - - FIRE FIGHTING MEASURES - - - - - - - - - -
  EXTINGUISHING MEDIA
    USE WATER SPRAY OR FOG NOZZLE TO KEEP CYLINDER COOL. MOVE CYLINDER
    AWAY FROM FIRE IF THERE IS NO RISK.
  SPECIAL FIREFIGHTING PROCEDURES
    WEAR SELF-CONTAINED BREATHING APPARATUS AND PROTECTIVE CLOTHING TO
    PREVENT CONTACT WITH SKIN AND EYES.
    DANGER: FLAMMABLE HIGH-PRESSURE GAS.
  UNUSUAL FIRE AND EXPLOSIONS HAZARDS
    VAPOR MAY TRAVEL CONSIDERABLE DISTANCE TO SOURCE OF IGNITION AND
    FLASH BACK.
    CONTAINER EXPLOSION MAY OCCUR UNDER FIRE CONDITIONS.
    MAY FORM EXPLOSIVE MIXTURES WITH AIR.
SECTION 6. - - - - - - - - ACCIDENTAL RELEASE MEASURES- - - - - - - - -
    EVACUATE AREA AND KEEP PERSONNEL UPWIND.
    SHUT OFF ALL SOURCES OF IGNITION.
    WEAR SELF-CONTAINED BREATHING APPARATUS, RUBBER BOOTS AND HEAVY
    RUBBER GLOVES.
    SHUT OFF LEAK IF THERE IS NO RISK.
    VENTILATE AREA AND WASH SPILL SITE AFTER MATERIAL PICKUP IS COMPLETE.
SECTION 7. - - - - - - - - - - HANDLING AND STORAGE- - - - - - - - - - -
    REFER TO SECTION 8.
  ADDITIONAL INFORMATION
    ALLENE CAN DECOMPOSE EXPLOSIVELY UNDER A PRESSURE OF 2 BAR.
    INCOMPATIBLE WITH COPPER, SILVER, MERCURY AND THEIR ALLOYS.
SECTION 8. - - - - - - EXPOSURE CONTROLS/PERSONAL PROTECTION- - - - - -
    CHEMICAL SAFETY GOGGLES.
    COMPATIBLE CHEMICAL-RESISTANT GLOVES.
    NIOSH/MSHA-APPROVED RESPIRATOR.
    SAFETY SHOWER AND EYE BATH.
    MECHANICAL EXHAUST REQUIRED.
    DO NOT BREATHE GAS.
    DO NOT GET IN EYES, ON SKIN, ON CLOTHING.
    WASH THOROUGHLY AFTER HANDLING.
    KEEP TIGHTLY CLOSED.
    KEEP AWAY FROM HEAT, SPARKS, AND OPEN FLAME.
    CYLINDER TEMPERATURE SHOULD NOT EXCEED 125 F(52 C).
    STORE AND USE WITH ADEQUATE VENTILATION.
    CONTENTS UNDER PRESSURE.
    WARNING: SUCK-BACK INTO CYLINDER MAY CAUSE RUPTURE.
    USE BACK-FLOW-PREVENTIVE DEVICE IN PIPING.
    USE WITH EQUIPMENT RATED FOR CYLINDER PRESSURE, AND OF COMPATIBLE
    MATERIALS OF CONSTRUCTION. CLOSE VALVE WHEN NOT IN USE AND WHEN EMPTY.
    MAKE SURE CYLINDER IS PROPERLY SECURED WHEN IN USE OR STORED.
SECTION 9. - - - - - - - PHYSICAL AND CHEMICAL PROPERTIES - - - - - - -
  APPEARANCE AND ODOR
    COLORLESS GAS
  PHYSICAL PROPERTIES
    BOILING POINT:        -34 C
    MELTING POINT:      -136 C
    EXPLOSION LIMITS IN AIR:
      UPPER                                    13%
      LOWER                                    2.1%
    VAPOR PRESSURE:      6795MM 21 C       8687MM 37.7 C
    VAPOR DENSITY:     1.42 @ 20 C
SECTION 10. - - - - - - - - -STABILITY AND REACTIVITY - - - - - - - - -
  INCOMPATIBILITIES
    STRONG OXIDIZING AGENTS
    STRONG BASES
  HAZARDOUS COMBUSTION OR DECOMPOSITION PRODUCTS
    CARBON MONOXIDE, CARBON DIOXIDE
SECTION 11. - - - - - - - - - TOXICOLOGICAL INFORMATION - - - - - - - -
  ACUTE EFFECTS
    MAY BE HARMFUL IF INHALED.
SECTION 12. - - - - - - - - - ECOLOGICAL INFORMATION - - - - - - - - - -
    DATA NOT YET AVAILABLE.
SECTION 13. - - - - - - - - - DISPOSAL CONSIDERATIONS - - - - - - - - -
    CAUTION: NO-RETURN CYLINDER. DO NOT REUSE. EMPTY CYLINDER WILL CONTAIN
    HAZARDOUS RESIDUE. FOLLOW PROPER DISPOSAL TECHNIQUES.
    OBSERVE ALL FEDERAL, STATE AND LOCAL ENVIRONMENTAL REGULATIONS.
SECTION 14. - - - - - - - - - - TRANSPORT INFORMATION - - - - - - - - -
    CONTACT ALDRICH CHEMICAL COMPANY FOR TRANSPORTATION INFORMATION.
SECTION 15. - - - - - - - - - REGULATORY INFORMATION - - - - - - - - - -
  EUROPEAN INFORMATION
    HIGHLY FLAMMABLE
    R 1
    HIGHLY FLAMMABLE
    S 16
    KEEP AWAY FROM SOURCES OF IGNITION - NO SMOKING.
    S 33
    TAKE PRECAUTIONARY MEASURES AGAINST STATIC DISCHARGES.
    S 38
    IN CASE OF INSUFFICIENT VENTILATION, WEAR SUITABLE
    RESPIRATORY EQUIPMENT.
SECTION 16. - - - - - - - - - - OTHER INFORMATION- - - - - - - - - - - -
    THE ABOVE INFORMATION IS BELIEVED TO BE CORRECT BUT DOES NOT PURPORT TO
    BE ALL INCLUSIVE AND SHALL BE USED ONLY AS A GUIDE. SIGMA, ALDRICH,
    FLUKA SHALL NOT BE HELD LIABLE FOR ANY DAMAGE RESULTING FROM HANDLING
    OR FROM CONTACT WITH THE ABOVE PRODUCT. SEE REVERSE SIDE OF INVOICE OR
    PACKING SLIP FOR ADDITIONAL TERMS AND CONDITIONS OF SALE.
    COPYRIGHT 2001 SIGMA-ALDRICH CO.
    LICENSE GRANTED TO MAKE UNLIMITED PAPER COPIES FOR INTERNAL USE ONLY