2,3-Butanedione
[CAS# 431-03-8]

Identification

• Classification: Organic raw materials >> Ketone compound
• Name: 2,3-Butanedione
• Synonyms: Butane-2,3-dione; Diacetyl
• Molecular Formula: C₄H₆O₂
• Molecular Weight: 86.09
• CAS Registry Number: 431-03-8
• EC Number: 207-069-8
• FEMA: 2370

Properties

• Density: 0.981
• Boiling point: 88 °C
• Refractive index: 1.391-1.399
• Flash point: 7 °C
• Water solubility: 200 g/L (20 °C)

Safety Data

• Hazard Symbols: F;Xn
• Risk Statements: R11;R20/21/22;R36/38
• Safety Statements: S16;S26;S36/37/39

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin irritation	Skin Irrit.	2	H315
Flammable liquids	Flam. Liq.	2	H225
Serious eye damage	Eye Dam.	1	H318
Acute toxicity	Acute Tox.	3	H331
Acute toxicity	Acute Tox.	4	H302
Specific target organ toxicity - repeated exposure	STOT RE	2	H373
Skin sensitization	Skin Sens.	1	H317
Specific target organ toxicity - single exposure	STOT SE	3	H335
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Eye irritation	Eye Irrit.	2	H319
Acute toxicity	Acute Tox.	4	H332
Skin sensitization	Skin Sens.	1B	H317
Specific target organ toxicity - repeated exposure	STOT RE	1	H372

• Transport Information: UN 2346