科丰化工

Isophthalic acid, also known as 1,3-phthalic acid, isophthalic acid, and isophthalic acid, is a dicarboxylic acid compound. The basic information is as follows:

CAS Number: 121-91-5

Molecular formula: C8H6O4

Molecular weight: 166.13

EINECS number: 204-506-4

Form: crystalline powder

Color: white to almost white

Melting point: 341-343℃(lit.)

Density: 1.54 g/cm3

Water solubility: slightly soluble in water

Stability: stable under normal temperature and pressure, but incompatible with strong oxidants and strong alkalis

Preparation: Industrially, m-xylene is used as raw material, cobalt acetate is used as catalyst, acetaldehyde is used as promoter, acetic acid is used as solvent, and isophthalic acid is produced by low-temperature liquid phase oxidation at 120°C under a pressure of about 0.6MPa.

Uses: Mainly used for the preparation of alkyd resins, unsaturated polyester resins and other high polymers and plasticizers, and also for the preparation of film film couplers, fiber dyeing modifiers, etc.

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