Acetoin CAS 513-86-0

English name	Acetoin
Chinese name	3-羟基-2-丁酮
CAS	513-86-0
Molecular formula	C4H8O2
Molecular weight	88.11
EINECS	208-174-1
Melting point	15 °C (monomer)
Boiling point	148 °C(lit.)
Bulk density	/
Density	1.013 g/mL at 25 °C(lit.)
Vapor density	/
Vapor pressure	86hPa at 20℃
Storage conditions	2-8°C
Solubility	H2O: 0.1 g/mL, clear
Form	Liquid (monomer) or powder or crystal (dimer)
Color	Light yellow to greenish yellow or white to yellow
Smell type	buttery

Purpose

3-Hydroxy-2-butanone can be used as a flavor enhancer for butter, cheese, coffee, and fruits. It is also used as an essence for preparing creams, dairy products, yogurt, and strawberry-type products, and is widely used in tobacco, medicine, etc. It has extremely high application value according to Chemicalbook. China's GB2760-86 stipulates it as a permitted food flavoring agent. In addition, 3-hydroxy-2-butanone is also an intermediate for synthesizing many flavor compounds and drugs.

GB 2760--1996 stipulates it as a permitted edible flavoring agent. It is mainly used for preparing cream, dairy products, yogurt, and strawberry-type flavor essences. It is also used in organic synthesis.

It has a milk-like aroma. China's GB2760-86 stipulates it as a permitted edible flavoring agent. It is mainly used for preparing cream, dairy products, yogurt, and strawberry-type flavor essences, and is also used in organic synthesis.

It can be used to produce 2,3-butanedione, which is used for preparing cream, dairy products, yogurt, and strawberry-type flavors. It is used as a pharmaceutical intermediate and an edible flavoring agent, mainly for preparing cream, dairy products, yogurt, and strawberry-type flavors.

Chemical properties 

The dimer of 3-hydroxy-2-butanone is a white crystalline powder, while the monomer is a colorless or pale yellow liquid. It has a creamy aroma. The boiling point is 148℃ and the melting point is 15℃. It can spontaneously combust. It is miscible with water, soluble in ethanol and propylene glycol, slightly soluble in ether, and almost insoluble in vegetable oil.

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