2,3-BUTANEDIONE 1168
November 2007
CAS No: 431-03-8 Diacetyl
RTECS No: EK2625000 Dimethylglyoxal
UN No: 2346 Dimethyl diketone
2,3-Diketobutane
Butanedione
CH3COCOCH3 / C4H6O2
Molecular mass: 86.1
TYPES OF
ACUTE HAZARDS/SYMPTOMS PREVENTION FIRST AID/FIRE FIGHTING
HAZARD/
EXPOSURE
FIRE Highly flammable. NO open flames, NO sparks, and NO Powder, alcohol-resistant foam, water
smoking. spray, carbon dioxide.
EXPLOSION Vapour/air mixtures are explosive. Closed system, ventilation, In case of fire: keep drums, etc., cool by
explosion-proof electrical equipment and spraying with water.
lighting.
EXPOSURE PREVENT GENERATION OF MISTS!
STRICT HYGIENE!
Inhalation Cough. Drowsiness. Nausea. Headache. Ventilation, local exhaust, or breathing Fresh air, rest. Refer for medical
Sore throat. protection. attention.
Skin Redness. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse
skin with plenty of water or shower.
Eyes Redness. Pain. Burns Safety goggles or eye protection in First rinse with plenty of water for several
combination with breathing protection. minutes (remove contact lenses if easily
possible), then take to a doctor.
Ingestion Sore throat. Do not eat, drink, or smoke during work. Rinse mouth. Give one or two glasses of
water to drink. Seek medical attention if
you feel unwell
SPILLAGE DISPOSAL PACKAGING & LABELLING
Personal protection: filter respirator for organic gases and UN classification
particulates adapted to the airborne concentration of the UN Hazard Class: 3
substance Collect leaking liquid in covered containers. UN Pack Group: II
Absorb remaining liquid in sand or inert absorbent and GHS classification
remove to safe place. Remove all ignition sources. Do NOT Signal: Danger
let this chemical enter the environment. Flame-Skull
Highly flammable liquid and vapour
Harmful if swallowed
Toxic if inhaled vapour
Causes skin irritation
Causes serious eye irritation
Harmful to aquatic life
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-30GF1-I+II Fireproof. Store in an area without drain or sewer access.
NFPA Code: H2; F3; R0
Prepared in the context of cooperation between the International
IPCS Programme on Chemical Safety and the European Commission 漏
IPCS 2006
International
Programme on
SEE IMPORTANT INFORMATION ON THE BACK.
Chemical Safety
1168 2,3-BUTANEDIONE
IMPORTANT DATA
Physical State; Appearance Routes of exposure
GREEN TO YELLOW LIQUID The substance can be absorbed into the body by inhalation and by
ingestion.
Physical dangers
The vapour is heavier than air and may travel along the ground; distant Inhalation risk
ignition possible. 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.
Chemical dangers
Heating may cause violent combustion or explosion. Effects of short-term exposure
The substance is severely irritating to the eyes. The substance is irritating
Occupational exposure limits to the skin and the respiratory tract The substance may cause effects on
TLV not established. the central nervous system. Exposure at high levels could cause lowering
MAK not established. of consciousness.
Effects of long-term or repeated exposure
The substance may have effects on the lungs, resulting in impaired
functions. SEE NOTES
PHYSICAL PROPERTIES
Boiling point: 88/C Relative density of the vapour/air-mixture at 20/C (air = 1): 0.99
Melting point: -2.4/C Flash point: 6/C c.c.
Relative density (water = 1): 1.1 Auto-ignition temperature: 365/C
Solubility in water: at 25 /C 20 g/100 ml Explosive limits, vol% in air: 2.4-13 vol%
Vapour pressure, kPa at 25/C: 7.6 Octanol/water partition coefficient as log Pow: -1.34
Relative vapour density (air = 1): 3
ENVIRONMENTAL DATA
The substance is harmful to aquatic organisms.
NOTES
Workers exposed to this substance in conjunction with other substances have been found to be at an increased risk of bronchiolitis obliterans. However,
the evidence is inadequate at this time to conclude that it is this specific substance that is responsible
Health effects of exposure to the substance have not been investigated adequately.
Environmental effects from the substance have not been investigated adequately.
Do NOT take working clothes home.
ADDITIONAL INFORMATION
Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible
LEGAL NOTICE for the use which might be made of this information
漏IPCS 2006
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