33214

Acetic anhydride

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

• Synonyme(s) : Acetanhydride, Acetic acid anhydride, Acetyl acetate, Acetyl anhydride, Ethanoic anhydride
• Formule linéaire : (CH₃CO)₂O
• Numéro CAS: 108-24-7
• Poids moléculaire : 102.09
• Beilstein: 385737
• Numéro CE : 203-564-8
• Numéro MDL: MFCD00008705
• Code UNSPSC : 12352100
• ID de substance PubChem : 329754473
• Nomenclature NACRES : NA.21

Propriétés

• Qualité: ACS reagent; puriss. p.a.
• Niveau de qualité: 200
• Agence: USP/NF; reag. ISO; reag. Ph. Eur.
• Densité de vapeur: 3.5 (vs air)
• Pression de vapeur: 10 mmHg ( 36 °C); 4 mmHg ( 20 °C)
• Essai: ≥99% (GC)
• Température d'inflammation spontanée: 629 °F
• Limite d'explosivité: 10.3 %
• Impuretés: ≤0.003% non-volatile matter; ≤0.01% KMnO₄ red. matter (as O)
• Indice de réfraction: n20/D 1.390 (lit.)
• pb: 138-140 °C (lit.)
• Pf: −73 °C (lit.)
• Densité: 1.08 g/mL (lit.)
• Traces d'anions: chloride (Cl^-): ≤2 mg/kg; phosphate (PO₄^3-): ≤10 mg/kg; sulfate (SO₄^2-): ≤5 mg/kg
• Traces de cations: 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
• Adéquation: passes test for reaction against H₂SO₄
• Chaîne SMILES: CC(=O)OC(C)=O
• InChI: 1S/C4H6O3/c1-3(5)7-4(2)6/h1-2H3
• Clé InChI: WFDIJRYMOXRFFG-UHFFFAOYSA-N

Description

Description générale

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.

Application

• 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).

Autres remarques

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.

Informations sur la sécurité

• Pictogrammes: GHS02,GHS06,GHS05
• Mention d'avertissement: Danger
• Mentions de danger: H226,H302,H314,H330
• Conseils de prudence: P210 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Classification des risques: Acute Tox. 2 Inhalation - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B
• Code de la classe de stockage: 3 - Flammable liquids
• Classe de danger pour l'eau (WGK): WGK 1
• Point d'éclair (°F): 120.2 °F - closed cup
• Point d'éclair (°C): 49 °C - closed cup