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去水醋酸

脱水乙酸
IUPAC名
3-acetyl-2-hydroxy-6-methyl-4H-pyran-4-one
英文名 Dehydroacetic acid
别名 脱水醋酸、去水醋酸、3-乙酰基-6-甲基-吡喃-2,4二酮
识别
CAS号 520-45-6  checkY
PubChem 10623
SMILES
 
  • O=C(C)C=1(=O)C=C(C)OC=1O
性质
化学式 C8H8O4
摩尔质量 168.14672 g·mol⁻¹
外观 白色结晶粉末
溶解性 <0.1%
危险性
欧盟危险性符号
有害有害 Xn
警示术语 R:R22, R33
安全术语 S:S36
MSDS External MSDS
欧盟编号 208-293-9
NFPA 704
1
1
0
 
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

脱水乙酸去水醋酸,简称DHAADHA,常被误译为“脱氢乙酸”,而dehydro-是“脱水”,非dehydrogen-“脱氢”)是一种常用的防腐剂,是吡喃的衍生物。由二乙烯酮在碱性条件下缩合制备。

脱水乙酸对水的溶解度小,其盐类脱水乙酸钠对水的溶解度较大,因此后者也常用来作为防腐剂。

在工业上,脱水乙酸也常用作合成纤维的塑化剂。[1]

参照

[编辑]
  1. ^ Merck Index, 11th Edition, 2855.
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去水醋酸
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