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 is also used in the production of alkyd resins and polyester resins which are further used in paints and lacquers, certain dyes (anthraquinone, phthalein, rhodamine, phthalocyanine, fluorescein, and xanthene dyes), insect repellents, and urethane polyester polyols. It is also 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.



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