Diacetyl for synthesis


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ynonyms 2,3-Butanedione, 2,3-Butadione, Dimethyldiketon, Dimethylglyoxal
Description Diacetyl

Product Information
CAS number 431-03-8
EC number 207-069-8
Hill Formula C₄H₆O₂
Chemical formula CH₃COCOCH₃
Molar Mass 86.09 g/mol
HS Code 2914 19 90
Structure formula Image Structure formula Image
Quality Level MQ200

Application Diacetyl for synthesis. CAS 431-03-8, chemical formula CH₃COCOCH₃.

Physicochemical Information
Boiling point 89 – 90 °C (1013 hPa)
Density 0.99 g/cm3 (20 °C)
Explosion limit 2.4 – 13.0 %(V)
Flash point 7 °C
Ignition temperature 365 °C
Melting Point -2 °C
Vapor pressure 52 hPa (20 °C)
Solubility 200 g/l

Toxicological Information
LD 50 oral LD50 Rat 1580 mg/kg
LD 50 dermal LD50 Rabbit > 5000 mg/kg

Safety Information according to GHS
Hazard Pictogram(s) Hazard Pictogram(s)
Hazard Pictogram(s)
Hazard Pictogram(s)
Hazard Pictogram(s)
Hazard Statement(s) H225: Highly flammable liquid and vapour.
H302: Harmful if swallowed.
H315: Causes skin irritation.
H317: May cause an allergic skin reaction.
H318: Causes serious eye damage.
H331: Toxic if inhaled.
H373: May cause damage to organs through prolonged or repeated exposure if inhaled.
Precautionary Statement(s) P210: Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P240: Ground/bond container and receiving equipment.
P280: Wear protective gloves.
P280: Wear eye protection.
P302 + P352: IF ON SKIN: Wash with plenty of soap and water.
P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician.
P403 + P233: Store in a well-ventilated place. Keep container tightly closed.
Signal Word Danger
RTECS EK2625000
Storage class 3 Flammable liquids
WGK WGK 2 obviously hazardous to water
Disposal 3
Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.

Safety Information
Hazard Symbols Hazard SymbolsHarmful
Hazard SymbolsFlammable
Categories of danger highly flammable, harmful, irritant
R Phrase R 11-20/22-36/38
Highly flammable.Harmful by inhalation and if swallowed.Irritating to eyes and skin.
S Phrase S 16-26
Keep away from sources of ignition – No smoking.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

Storage and Shipping Information
Storage Store at +2°C to +8°C.

Transport Information
Declaration (railroad and road) ADR, RID UN 2346 , 3, II
Declaration (transport by air) IATA-DGR UN 2346 , 3, II
Declaration (transport by sea) IMDG-Code UN 2346 , 3, II

Assay (GC, area%) ≥ 97.0 % (a/a)
Density (d 20 °C/ 4 °C) 0.984 – 0.987
Identity (IR) passes test

Additional information


100ml, 250ml


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