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Merck
CN
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安全信息

33214

Sigma-Aldrich

乙酸酐

puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99% (GC)

别名:

Acetanhydride, Acetic acid anhydride, Acetyl acetate, Acetyl anhydride, Ethanoic anhydride

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About This Item

线性分子式:
(CH3CO)2O
CAS号:
108-24-7
分子量:
102.09
Beilstein:
385737
EC 号:
203-564-8
MDL编号:
MFCD00008705
UNSPSC代码:
12352100
PubChem化学物质编号:
329754473
NACRES:
NA.21

等级

ACS reagent
puriss. p.a.

质量水平

200

Agency

USP/NF
reag. ISO
reag. Ph. Eur.

蒸汽密度

3.5 (vs air)

蒸汽压

10 mmHg ( 36 °C)
4 mmHg ( 20 °C)

检测方案

≥99% (GC)

自燃温度

629 °F

expl. lim.

10.3 %

杂质

≤0.003% non-volatile matter
≤0.01% KMnO4 red. matter (as O)

折射率

n20/D 1.390 (lit.)

bp

138-140 °C (lit.)

mp

−73 °C (lit.)

密度

1.08 g/mL (lit.)

痕量阴离子

chloride (Cl-): ≤2 mg/kg
phosphate (PO43-): ≤10 mg/kg
sulfate (SO42-): ≤5 mg/kg

痕量阳离子

Al: ≤0.5 mg/kg
B: ≤0.02 mg/kg
Ba: ≤0.1 mg/kg
Ca: ≤0.5 mg/kg
Cd: ≤0.05 mg/kg
Co: ≤0.02 mg/kg
Cr: ≤0.05 mg/kg
Cu: ≤0.02 mg/kg
Fe: ≤0.1 mg/kg
Mg: ≤0.1 mg/kg
Mn: ≤0.02 mg/kg
Ni: ≤0.02 mg/kg
Pb: ≤0.1 mg/kg
Sn: ≤0.1 mg/kg
Zn: ≤0.2 mg/kg

适用性

passes test for reaction against H2SO4

SMILES字符串

CC(=O)OC(C)=O

InChI

1S/C4H6O3/c1-3(5)7-4(2)6/h1-2H3

InChI key

WFDIJRYMOXRFFG-UHFFFAOYSA-N

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相关类别

一般描述

Acetic anhydride is a colorless liquid. On dissolution in water, it undergoes solvolysis to afford acetic acid. It is widely employed as acetylation reagent for the acetylation of various alcohols. Wacher process (starting reagent + a ketene) and Knapsack process (starting reagent = acetaldehyde) have been reported for the industrial preparation of acetic anhydride. It is employed as solvent for various organic reactions.

应用

  • Modification of Quinoa Starches: Acetic anhydride is used to modify the structure of starch molecules, discussing its implications on improving bread quality and food processing (Wang et al., 2024).

其他说明

The article number 33214-4X2.5L will be discontinued. Please order the single bottle 33214-2.5L which is physically identical with the same exact specifications.
The article number 33214-4X2.5L-M will be discontinued. Please order the single bottle 33214-2.5L-M which is physically identical with the same exact specifications.
The article number 33214-6X1L will be discontinued. Please order the single bottle 33214-1L which is physically identical with the same exact specifications.
The article number 33214-6X1L-M will be discontinued. Please order the single bottle 33214-1L-M which is physically identical with the same exact specifications.

警示用语：

Danger

危险分类

Acute Tox. 2 Inhalation - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B

WGK

WGK 1

闪点(°F)

closed cup

闪点(°C)

closed cup

法规信息

危险化学品
易制毒化学品（2类）

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P Barath et al.
The American journal of pathology, 137(3), 503-509 (1990-09-01)
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Acetylation of anisole by acetic anhydride over a HBEA zeolite-Origin of deactivation of the catalyst.
Rohan D, et al.
J. Catal., 177(2), 296-305 (1998)
Eagleson M.
Concise Encyclopedia Chemistry, 5-5 (1994)
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