Acetic anhydride

Product Name

Acetic anhydride, ACS reagent, ≥98.0%

InChI key

WFDIJRYMOXRFFG-UHFFFAOYSA-N

InChI

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

SMILES string

CC(=O)OC(C)=O

grade

ACS reagent

vapor density

3.5 (vs air)

vapor pressure

10 mmHg ( 36 °C)
4 mmHg ( 20 °C)

assay

≥98.0%

form

liquid

autoignition temp.

629 °F

expl. lim.

10.3 %

impurities

MnO₄^– reducers, passes test

evapn. residue

≤0.003%

refractive index

n20/D 1.390 (lit.)

bp

138-140 °C (lit.)

mp

−73 °C (lit.)

solubility

H₂O: slightly soluble

density

1.08 g/mL (lit.)

anion traces

chloride (Cl^–): ≤5 ppm
phosphate (PO₄^3-): ≤0.001%
sulfate (SO₄^2-): ≤5 ppm

cation traces

Fe: ≤5 ppm
heavy metals: ≤2 ppm

functional group

anhydride
ester

Quality Level

200