Skip to Content
MilliporeSigma
All Photos(2)

Key Documents

125733

Sigma-Aldrich

Phthalic anhydride

ReagentPlus®, 99%

Synonym(s):

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

Sign Into View Organizational & Contract Pricing


About This Item

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

vapor density

5.1 (vs air)

Quality Level

vapor pressure

<0.01 mmHg ( 20 °C)

product line

ReagentPlus®

assay

99%

form

flakes

autoignition temp.

1058 °F

expl. lim.

10.4 %

bp

284 °C (lit.)

mp

131-134 °C (lit.)

functional group

anhydride
ester

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

Looking for similar products? Visit Product Comparison Guide

General description

Phthalic anhydride is an industrially important chemical. It can be prepared from o-xylene or naphthalene. It is widely used for the industrial preparation of plasticizers for PVC (polyvinyl chloride).
Phthalic anhydride can be synthesized via oxidation of o-xylene, in the presence of V2O5/TiO2 monolithic catalyst supported by aluminium honeycomb.

Application

Phthalic anhydride may be used in the synthesis of the following compounds:
  • pthalimide
  • phenolphthalein
  • anthracene

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

signalword

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

11 - Combustible Solids

wgk_germany

WGK 1

flash_point_f

305.6 °F - DIN 51758

flash_point_c

152 °C - DIN 51758

ppe

dust mask type N95 (US), Eyeshields, Faceshields, Gloves


Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

"Conductive monolithic catalysts: development and industrial pilot tests for the oxidation of o-xylene to phthalic anhydride"
Groppi G, et al.
Industrial & Engineering Chemistry Research, 51(22), 7590-7596 (2011)
Catalysts, kinetics and reactor design in phthalic anhydride synthesis.
Wainwright MS and Foster NR.
Catalysis Reviews: Science and Engineering, 19(2), 211-292 (1979)
Phthalic anhydride from o-xylene catalysis: science and engineering.
Nikolov V, et al.
Catalysis Reviews: Science and Engineering, 33(3-4), 319-374 (1991)
Eagleson M.
Concise Encyclopedia Chemistry, 77-77 (1994)
F Safinejad et al.
Journal of molecular modeling, 15(9), 1119-1124 (2009-02-24)
The solvent-induced changes in the optical and spectroscopic properties of 1,2-benzenedicarboxylic anhydride are studied using time dependent Hartree-Fock and density functional theory calculations within the framework of two reaction field procedures. To investigate the influence of the cavity shape, the

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service