ACETOIN

PRODUCT IDENTIFICATION

CAS NO 513-86-0

ACETOIN

EINECS NO. 208-174-1
FORMULA CH3COCH(OH)CH3
MOL WT. 88.11

H.S. CODE

2914.40

TOXICITY

Oral rat LD50: > 5000 mg/kg
SYNONYMS

Acetyl Methyl Carbinol; 3-Hydroxy-2-butanone;

2-Butanol-3-one; 3-Hydroxybutan-2-one; Dimethylketol; -Hydroxy--oxobutane; Acetylmethyl-Methanol; 1-Hydroxyethyl methyl ketone; 2-Hydroxy-3-butanone; 2,3-Butanolone; 3-Hydroxy-2-butanone; 2-Butanol-3-one;
PRICE

 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

slightly yellow liquid (dimer; crystals)

MELTING POINT

15 C
BOILING POINT 148 C
SPECIFIC GRAVITY 1.01 - 1.02

SOLUBILITY IN WATER

soluble (miscible with alcohol, PG; Insoluble in fatty oils)
pH  
VAPOR DENSITY 3.04

AUTOIGNITION

 

NFPA RATINGS

 

REFRACTIVE INDEX

1.4170 - 1.4210
FLASH POINT

55 C

STABILITY Stable under ordinary conditions

APPLICATIONS

Acetoin, 3-hydroxy-2-butanone, containing a ketone as well as a hydroxy group in one short chain molecular (C4 chain). It is an intermediate of the butanediol cycle in microorganisms. It is formed in the fermentation of glucose by certain bacteria (Enterobacteriaceae). In mammals it is oxidized to carbon dioxide. Commercially it is prepared from diacetyl by partial reduction with zinc and acid. It is a pale yellow to green yellow liquid with a butter like odour; melting point 15 C; soluble in water; miscible with alcohols; insoluble in fatty oils. It is used as a flavoring and a fragrance. It is used as an aroma carrier in the preparation of flavors and essences.
SALES SPECIFICATION

APPEARANCE

pale yellow to green yellow liquid or crystals

REFRACTIVE INDEX

1.4170 - 1.4210
ASSAY (G.C)

96.0% min

TRANSPORTATION
PACKING  
HAZARD CLASS 3 (Packing group: III)
UN NO. 2621
OTHER INFORMATION

Shelf life: 6 months
Hazard Symbols: n/a, Risk Phrases: 10, Safety Phrases: 9/16/28A/33/37/45