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797995

Sigma-Aldrich

Phthalic anhydride

anhydrous, free-flowing, Redi-Dri, ACS reagent, ≥99%

Synonym(s):

1,2-Benzenedicarboxylic anhydride, 1,3-Isobenzofurandione, Phthalic acid anhydride

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About This Item

Empirical Formula (Hill Notation):
C8H4O3
CAS Number:
Molecular Weight:
148.12
Beilstein:
118515
EC Number:
MDL number:
UNSPSC Code:
12352100
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent
anhydrous

Quality Level

vapor density

5.1 (vs air)

vapor pressure

<0.01 mmHg ( 20 °C)

product line

Redi-Dri

Assay

≥99%

form

powder

autoignition temp.

1058 °F

expl. lim.

10.4 %

ign. residue

≤0.01%

bp

284 °C (lit.)

mp

131-134 °C (lit.)

anion traces

chloride (Cl-): ≤0.002%
sulfate (SO42-): ≤0.003%

cation traces

Fe: ≤5 ppm
heavy metals: ≤5 ppm (by ICP)

SMILES string

O=C1OC(=O)c2ccccc12

InChI

1S/C8H4O3/c9-7-5-3-1-2-4-6(5)8(10)11-7/h1-4H

InChI key

LGRFSURHDFAFJT-UHFFFAOYSA-N

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Legal Information

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

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Product No.
Description
Pricing

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

305.6 °F - DIN 51758

Flash Point(C)

152 °C - DIN 51758


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