MilliporeSigma
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125733

Sigma-Aldrich

Phthalic anhydride

ReagentPlus®, 99%

Empirical Formula (Hill Notation):
C8H4O3
CAS Number:
Molecular Weight:
148.12
Beilstein:
118515
EC Number:
MDL number:
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.)

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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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

Packaging

1 kg in poly bottle
2.5 kg in poly drum
16 kg in fiber drum

Legal Information

ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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