33214

Acetic anhydride

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

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

Propiedades

• grado: ACS reagent; puriss. p.a.
• Nivel de calidad: 200
• Agency: USP/NF; reag. ISO; reag. Ph. Eur.
• densidad de vapor: 3.5 (vs air)
• presión de vapor: 10 mmHg ( 36 °C); 4 mmHg ( 20 °C)
• Ensayo: ≥99% (GC)
• temp. de autoignición: 629 °F
• lim. expl.: 10.3 %
• impurezas: ≤0.003% non-volatile matter; ≤0.01% KMnO₄ red. matter (as O)
• índice de refracción: n20/D 1.390 (lit.)
• bp: 138-140 °C (lit.)
• mp: −73 °C (lit.)
• densidad: 1.08 g/mL (lit.)
• trazas de anión: chloride (Cl^-): ≤2 mg/kg; phosphate (PO₄^3-): ≤10 mg/kg; sulfate (SO₄^2-): ≤5 mg/kg
• trazas de catión: 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
• idoneidad: passes test for reaction against H₂SO₄
• cadena SMILES: CC(=O)OC(C)=O
• InChI: 1S/C4H6O3/c1-3(5)7-4(2)6/h1-2H3
• Clave InChI: WFDIJRYMOXRFFG-UHFFFAOYSA-N

Descripción

Descripción general

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.

Aplicación

• 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).

Otras 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.

Información de seguridad

• Pictogramas: GHS02,GHS06,GHS05
• Palabra de señalización: Danger
• Frases de peligro: H226,H302,H314,H330
• Consejos de prudencia: P210 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Clasificaciones de peligro: Acute Tox. 2 Inhalation - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B
• Código de clase de almacenamiento: 3 - Flammable liquids
• Clase de riesgo para el agua (WGK): WGK 1
• Punto de inflamabilidad (°F): 120.2 °F - closed cup
• Punto de inflamabilidad (°C): 49 °C - closed cup