33214

Acetic anhydride

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

• Sinônimo(s): Acetanhydride, Acetic acid anhydride, Acetyl acetate, Acetyl anhydride, Ethanoic anhydride
• Fórmula linear: (CH₃CO)₂O
• Número CAS: 108-24-7
• Peso molecular: 102.09
• Beilstein: 385737
• Número CE: 203-564-8
• Número MDL: MFCD00008705
• Código UNSPSC: 12352100
• ID de substância PubChem: 329754473
• NACRES: NA.21

Propriedades

• grau: ACS reagent; puriss. p.a.
• Nível de qualidade: 200
• Agency: USP/NF; reag. ISO; reag. Ph. Eur.
• densidade de vapor: 3.5 (vs air)
• pressão de vapor: 10 mmHg ( 36 °C); 4 mmHg ( 20 °C)
• Ensaio: ≥99% (GC)
• temperatura de autoignição: 629 °F
• Lim. expl.: 10.3 %
• Impurezas: ≤0.003% non-volatile matter; ≤0.01% KMnO₄ red. matter (as O)
• índice de refração: n20/D 1.390 (lit.)
• pb: 138-140 °C (lit.)
• pf: −73 °C (lit.)
• densidade: 1.08 g/mL (lit.)
• traços de ânion: chloride (Cl^-): ≤2 mg/kg; phosphate (PO₄^3-): ≤10 mg/kg; sulfate (SO₄^2-): ≤5 mg/kg
• traços de cátion: 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
• adequação: passes test for reaction against H₂SO₄
• cadeia de caracteres SMILES: CC(=O)OC(C)=O
• InChI: 1S/C4H6O3/c1-3(5)7-4(2)6/h1-2H3
• chave InChI: WFDIJRYMOXRFFG-UHFFFAOYSA-N

Descrição

Descrição geral

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.

Aplicação

• 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).

Outras notas

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.

Informações de segurança

• Pictogramas: GHS02,GHS06,GHS05
• Palavra indicadora: Danger
• Frases de perigo: H226,H302,H314,H330
• Declarações de precaução: P210 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Classificações de perigo: Acute Tox. 2 Inhalation - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B
• Código de classe de armazenamento: 3 - Flammable liquids
• Classe de risco de água (WGK): WGK 1
• Ponto de fulgor (°F): 120.2 °F - closed cup
• Ponto de fulgor (°C): 49 °C - closed cup