Phthalic Anhydride CAS 85-44-9

• Customization: Available
• CAS No.: 85-44-9
• Formula: C8h4o3
• Classification: Substituted Benzenes
• Shape: Powdery
• Grade Standard: Industrial Grade
• Melting Point: -41 °c (Lit.)
• Density: 1, 53 g/cm3
• Color (Apha) Colour: ≤20
• Transport Package: in 25kg/Drum
• Specification: 99%min
• Trademark: SWC
• Origin: China
• Production Capacity: 20mts/Month

Product Description

Product Description

Phthalic anhydride is an organic compound with molecular formula c8h4o3. It is a cyclic anhydride
formed by intramolecular dehydration of phthalic acid. Phthalic anhydride is a white solid. It is an
important raw material in chemical industry, especially in the manufacture of plasticizer. Hydrolysis,
alcoholysis and ammonolysis can occur, and anthraquinone derivatives can be synthesized by
reacting with aromatic hydrocarbons. Phthalic anhydride is industrially prepared by vapor phase
oxidation of naphthalene and air at 350 ~ 360 ºC under the catalysis of vanadium pentoxide.
It can also be prepared by air oxidation of o-xylene.

Item	Standard
Product Name	O-Phthalic Anhydride,Phthalic Anhydride,PA
Purity	≥99.5%
CAS NO	85-44-9
EINECS No.	201-607-5
Appearance	White scale or crystalline powder
Melting chromaticity number	≤20
Crystallization point ºC	≥130.8
Thermal stability color number	≤50
Free acid%	≤0.20
Molecular Formula	C8H4O3
Application	Plasticizer Manufacturing Raw Material.Curing agent for epoxy resin etc.

Phthalic anhydride uses

1.Phthalic anhydride is one of the most important organic chemical raw materials, and its main
derivatives are dibutyl phthalate; Dioctyl ester and diisobutyl ester are used as plasticizers for
PVC, etc; It can also be used to produce unsaturated polyester resin; Alkyd resin; Dyes and
pigments; Various paints; Food additives; Phenolphthalein, a laxative in medicine; Imiphos in
pesticides; Clomazone and saccharin sodium, etc.
2.Phthalic anhydride is used as curing agent of epoxy resin.