33214

Acetic anhydride

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

• Sinonimo/i: Acetanhydride, Acetic acid anhydride, Acetyl acetate, Acetyl anhydride, Ethanoic anhydride
• Formula condensata: (CH₃CO)₂O
• Numero CAS: 108-24-7
• Peso molecolare: 102.09
• Beilstein: 385737
• Numero CE: 203-564-8
• Numero MDL: MFCD00008705
• Codice UNSPSC: 12352100
• ID PubChem: 329754473
• NACRES: NA.21

Proprietà

• Grado: ACS reagent; puriss. p.a.
• Livello qualitativo: 200
• agenzia: USP/NF; reag. ISO; reag. Ph. Eur.
• Densità del vapore: 3.5 (vs air)
• Tensione di vapore: 10 mmHg ( 36 °C); 4 mmHg ( 20 °C)
• Saggio: ≥99% (GC)
• Temp. autoaccensione: 629 °F
• Limite di esplosione: 10.3 %
• Impurezze: ≤0.003% non-volatile matter; ≤0.01% KMnO₄ red. matter (as O)
• Indice di rifrazione: n20/D 1.390 (lit.)
• P. ebollizione: 138-140 °C (lit.)
• Punto di fusione: −73 °C (lit.)
• Densità: 1.08 g/mL (lit.)
• Anioni in tracce: chloride (Cl^-): ≤2 mg/kg; phosphate (PO₄^3-): ≤10 mg/kg; sulfate (SO₄^2-): ≤5 mg/kg
• Cationi in tracce: 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
• Compatibilità: passes test for reaction against H₂SO₄
• Stringa SMILE: CC(=O)OC(C)=O
• InChI: 1S/C4H6O3/c1-3(5)7-4(2)6/h1-2H3; WFDIJRYMOXRFFG-UHFFFAOYSA-N

Descrizione

Descrizione generale

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.

Applicazioni

• 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).

Altre note

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.

Informazioni sulla sicurezza

• Pittogrammi: GHS02,GHS06,GHS05
• Avvertenze: Danger
• Indicazioni di pericolo: H226,H302,H314,H330
• Consigli di prudenza: P210 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Classi di pericolo: Acute Tox. 2 Inhalation - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B
• Codice della classe di stoccaggio: 3 - Flammable liquids
• Classe di pericolosità dell'acqua (WGK): WGK 1
• Punto d’infiammabilità (°F): 120.2 °F - closed cup
• Punto d’infiammabilità (°C): 49 °C - closed cup