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320064

Sigma-Aldrich

Phthalic anhydride

ACS reagent, ≥99%

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Synonym(s):
1,2-Benzenedicarboxylic anhydride, 1,3-Isobenzofurandione, Phthalic acid anhydride
Empirical Formula (Hill Notation):
C8H4O3
CAS Number:
Molecular Weight:
148.12
Beilstein/REAXYS Number:
118515
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

vapor density

5.1 (vs air)

vapor pressure

<0.01 mmHg ( 20 °C)

assay

≥99%
99.0-100.2%

form

flakes

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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This Item
125733797995402915
Phthalic anhydride ACS reagent, &#8805;99%

320064

Phthalic anhydride

Phthalic anhydride ReagentPlus&#174;, 99%

125733

Phthalic anhydride

Phthalic anhydride anhydrous, free-flowing, Redi-Dri&#8482;, ACS reagent, &#8805;99%

797995

Phthalic anhydride

Phthalic acid ACS reagent, &#8805;99.5%

402915

Phthalic acid

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

form

flakes

form

flakes

form

powder

form

powder or crystals

mp

131-134 °C (lit.)

mp

131-134 °C (lit.)

mp

131-134 °C (lit.)

mp

210-211 °C (dec.) (lit.)

bp

284 °C (lit.)

bp

284 °C (lit.)

bp

284 °C (lit.)

bp

-

grade

ACS reagent

grade

-

grade

ACS reagent, anhydrous

grade

ACS reagent

General description

Phthalic anhydride is an anhydride of phthalic acid and a key intermediate in the production of plasticizers, dyes, polyesters resins, modifiers for rubber, and polymers.

Application

Phthalic anhydride may be used as a reactant in the preparation of N-substituted phthalimides, poly(isothianaphthene) and methyl (S)-2-phthalimido-4-methylthiobutanoate.

Legal Information

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

related product

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


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New synthetic ?tricks? One-pot preparation of N-substituted phthalimides from azides and phthalic anhydride
Garcia J, et al.
Tetrahedron Letters, 27(5), 639-640 (1986)
Phthalic Acid and Derivatives
Ullmann's Encyclopedia of Industrial Chemistry (2007)
New synthetic routes to poly (isothianaphthene) I. Reaction of phthalic anhydride and phthalide with phosphorus pentasulfide.
van Asselt R, et al.
Synt. Metals, 74(1), 65-70 (1995)
Ceramic foams directly-coated with flame-made V2O5/TiO2 for synthesis of phthalic anhydride
Schimmoeller B, et al.
J. Catal., 243(1), 82-92 (2006)
Methyl (S)-2-phthalimido-4-oxobutanoate
Meffre P, et al.
Organic Syntheses, 76, 123-123 (1999)

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