International Chemical Safety Cards

2,3-BUTANEDIONE ICSC: 1168

2,3-BUTANEDIONE
Diacetyl
Dimethylglyoxal
Dimethyl diketone
2,3-Diketobutane
CH3COCOCH3/C4H6O2
Molecular mass: 86.1
CAS # 431-03-8 0
RTECS # EK2625000
ICSC # 1168
UN # 2346
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Highly flammable.
NO open flames, NO sparks, and NO smoking.
Powder, alcohol-resistant foam, water spray, carbon dioxide.
EXPLOSION Vapour/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
PREVENT GENERATION OF MISTS!

  • INHALATION

    		• Ventilation, local exhaust, or breathing protection.
    		Fresh air, rest.
  • SKIN

    		• Protective gloves. Protective clothing.
    		Remove contaminated clothes. Rinse skin with plenty of water or shower.
  • EYES

    		• Safety spectacles.
    		First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
  • INGESTION

    		• Do not eat, drink, or smoke during work. Wash hands before eating.
    		Rinse mouth. Give plenty of water to drink. Rest.
    SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
    Collect leaking liquid in covered containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place (extra personal protection: A/P2 filter respirator for organic vapour and harmful dust).
    		Fireproof.

    UN Hazard Class: 3
    UN Packing Group: II
    SEE IMPORTANT INFORMATION ON BACK
    ICSC: 1168 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993 No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and IDLH values.

    International Chemical Safety Cards

    2,3-BUTANEDIONE ICSC: 1168

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    PHYSICAL STATE; APPEARANCE:
     GREEN TO YELLOW MOBILE LIQUID.

    PHYSICAL DANGERS:
     The vapour is heavier than air and may travel along the ground; distant ignition possible.

    CHEMICAL DANGERS:
     Heating may cause violent combustion or explosion.

    OCCUPATIONAL EXPOSURE LIMITS (OELs):
     TLV not established.


    		ROUTES OF EXPOSURE:
     The substance can be absorbed into the body by inhalation and through the skin.

    INHALATION RISK:
     No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C.

    EFFECTS OF SHORT-TERM EXPOSURE:

    EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
     Repeated or prolonged contact may cause skin sensitization.
    PHYSICAL
    PROPERTIES
    Boiling point: 88°C
    Melting point: -2.4°C
    Relative density (water = 1): 1
    Solubility in water: miscible
    		Relative vapour density (air = 1): 3
    Flash point: 6°C
    Octanol/water partition coefficient as log Pow: -1.34
    ENVIRONMENTAL
    DATA
    N O T E S
    Explosive limits are unknown in literature, although the substance is highly flammable and has a flash point <21°C.
    Transport Emergency Card: TEC (R)-30G30
    NFPA Code: H1; F3; R0
    ADDITIONAL INFORMATION


    ICSC: 1168 2,3-BUTANEDIONE
    © IPCS, CEC, 1993
    IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and IDLH values.