Phthalic Anhydride

Technical Data :

Test

Test Method

Specification

Crystallization point, ^oC, (min.)

QAS - W - 005
Eq. to ASTM D - 1493

130.8

Colour of the molten material,
HU, (max.)

QAS - W - 139
Eq. to ASTM D - 3366

Colour of the molten material
after heat treatment, HU, (max.)

QAS - W - 139
Eq. to ASTM D - 3366

Free acidity as Phthalic acid,
percent by mass , (max.)

QAS - W - 134
Eq. to IS 5158 A- 4

0.10

Total acidity as Phthalic Anhydride,
percent by mass, (min.)

QAS - W - 132
Eq. to IS 5158 A- 5

99.7

Maleic Anhydride and other oxidizable impurities(as maleic anhydride ) percent by mass, (max.)

QAS - W - 135
Eq. to IS 5158 A- 6

0.04

Application

PHTHALIC ANHYDRIDE is used in the manufacture of alkyd resins for paints and varnishes.
PHTHALIC ANHYDRIDE esters like DOP, DIOP, DNP, DIDP etc. are the most acceptable plasticizers for PVC products. Whereas they are the characterised by their low volatility, high water resistance and better electrical properties, other phthalate plasticizers like BBP, BOP, DCHP satisfy fast gelling and low temperature requirement of vinyl resin based products.
PHTHALIC ANHYDRIDE is used in the manufacture of unsaturated polyester resins.
PHTHALIC ANHYDRIDE finds applications as Dye intermediate and also in the manufacture of pigments. whereas Anthraquinone and its derivatives are used in dyes, pigments like Phthalocyanines are used as colouring agents in laminates varnish, printing ink and plastic industries.
PHTHALIC ANHYDRIDE is used in the manufacture of Tetrachloro Phthalic Anhydride which finds applications in reactive fire retardant in unsaturated polyesters.

Packing