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33214 Sigma-Aldrich

Acetic anhydride

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

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Properties

Related Categories A-B, Puriss p.a. ACS, Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, Puriss p.a. ACS More...
grade   ACS reagent, reag. ISO, reag. Ph. Eur.
vapor density   3.5 (vs air)
vapor pressure   10 mmHg ( 36 °C)
  4 mmHg ( 20 °C)
InChI Key   WFDIJRYMOXRFFG-UHFFFAOYSA-N
grade   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

Description

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.

Packaging

1, 6×1, 2.5, 4×2.5 L in poly bottle

500 mL in poly bottle

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
RIDADR 
UN 1715 3(8) / PGII
WGK Germany 
1
RTECS 
AK1925000
Flash Point(F) 
120.2 °F
Flash Point(C) 
49 °C

Documents

Certificate of Analysis

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Protocols & Articles
Peer-Reviewed Papers
15

References

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