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Acetic anhydride

Linear Formula:
CAS Number:
Molecular Weight:
EC Number:
MDL number:

Quality Level

vapor density

3.5 (vs air)

vapor pressure

10 mmHg ( 36 °C)
4 mmHg ( 20 °C)

autoignition temp.

629 °F

expl. lim.

10.3 %

refractive index

n20/D 1.390 (lit.)


138-140 °C (lit.)


−73 °C (lit.)


H2O: slightly soluble


1.08 g/mL (lit.)

SMILES string




InChI key


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Signal Word


Hazard Statements

Hazard Classifications

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

Storage Class Code

3 - Flammable liquids



Flash Point(F)

120.2 °F - closed cup

Flash Point(C)

49 °C - closed cup

Certificate of Analysis

Certificate of Origin

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