Phthalic Anhydride (PA)

The primary use of phthalic anhydride (PA) is as a chemical intermediate in the production of plastics from vinyl chloride. Phthalate esters, which function as plasticizers, are derived from phthalic anhydride. Phthalic anhydride has another major use in the production of polyester resins and other minor uses in the production of alkyd resins used in paints and lacquers, certain dyes (anthraquinone, phthalein, rhodamine, phthalocyanine, fluorescein, and xanthene dyes), insect repellents, and urethane polyester polyols. It has also been used as a rubber scorch inhibitor and retarder.

Principal Properties : White Flakes. Mild Odour, Slightly soluble in ether and hot water.

Application : Used in Plasticizers, Alkyd Resins (Glyptal), to modify physical properties of Synthetic Resins.

Derivation : Air Oxidation of Ortho-Xylene.

Solubility : Alcohol, Carbon Di-Sulphide, Acetone.

Product Data

PA Contents
Colour index to hazen
Heat Stability
Boiling point
Solidification Point


99.8 wt%
20 APHA
50 APHA
285°
131°


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