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33214

Acetic anhydride

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

Synonyme(s) :

Acetanhydride, Acetic acid anhydride, Acetyl acetate, Acetyl anhydride, Ethanoic anhydride

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A propos de cet article

Formule linéaire :
(CH3CO)2O
Numéro CAS:
108-24-7
Poids moléculaire :
102.09
NACRES:
NA.21
PubChem Substance ID:
329754473
UNSPSC Code:
12352100
EC Number:
203-564-8
MDL number:
MFCD00008705
Beilstein/REAXYS Number:
385737
Assay:
≥99% (GC)
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Nom du produit

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

Quality Segment

200

agency

USP/NF, reag. ISO, reag. Ph. Eur.

vapor density

3.5 (vs air)

vapor pressure

10 mmHg ( 36 °C), 4 mmHg ( 20 °C)

grade

ACS reagent, puriss. p.a.

assay

≥99% (GC)

autoignition temp.

629 °F

expl. lim.

10.3 %

impurities

≤0.003% non-volatile matter, ≤0.01% KMnO4 red. matter (as O)

refractive index

n20/D 1.390 (lit.)

bp

138-140 °C (lit.)

mp

−73 °C (lit.)

density

1.08 g/mL (lit.)

anion traces

chloride (Cl-): ≤2 mg/kg, phosphate (PO43-): ≤10 mg/kg, sulfate (SO42-): ≤5 mg/kg

cation traces

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

suitability

passes test for reaction against H2SO4

SMILES string

CC(=O)OC(C)=O

InChI

1S/C4H6O3/c1-3(5)7-4(2)6/h1-2H3

InChI key

WFDIJRYMOXRFFG-UHFFFAOYSA-N

General description

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).

Other Notes

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.

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Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B

Classe de stockage

3 - Flammable liquids

flash_point_f

120.2 °F - closed cup

flash_point_c

49 °C - closed cup

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