33214

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
• 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

属性

• 等级: ACS reagent; puriss. p.a.
• 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)
• 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.)
• 沸点: 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 (PO₄^3-): ≤10 mg/kg; sulfate (SO₄^2-): ≤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

说明

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.[1]

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.

安全信息

• 象形图: GHS02,GHS06,GHS05
• 警示用语：: Danger
• 危险声明: H226,H302,H314,H330
• 预防措施声明: P210 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• 危险分类: Acute Tox. 2 Inhalation - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B
• 储存分类代码: 3 - Flammable liquids
• WGK: WGK 1
• 闪点(°F): 120.2 °F - closed cup
• 闪点(°C): 49 °C - closed cup