Terephthalic acid (PTA)

Chinese Name

Terephthalic acid

English Name

Terephthalic acid

Chinese Aliases

Purified terephthalic acid; PTA; 1,4-Benzenedicarboxylic acid; Terephthalic acid, Terephthalic acid; Turpentine terephthalic acid; Pure terephthalic acid; Terephthalic acid; Terephthalic acid; p-Dibenzic acid

CAS RN

100-21-0

EINECS Number

202-830-0

Molecular Formula

C₈H₆O₄

Molecular Weight

166.13324

Physical and Chemical Properties

Appearance White needle-like crystals or powder.
Relative Density 1.510g/cm³
Solubility Soluble in alkaline solutions, slightly soluble in hot ethanol, insoluble in water, ether, glacial acetic acid, and chloroform.

Uses

An important raw material for the production of polyester resins, films, fibers, insulating paints, and engineering plastics.