Tetrahydrophthalic anhydride (TPHA)

Synonyms：Cis-1,2,3,6-Tetrahydrophthalic anhydride; 3a,4,7,7a-Tetrahydroisobenzofuran-1,3-dione

CAS No.：85-43-8

EINECS No.：213-308-7

Molecular Formula：C₈H₈O₃

Molecular Weight：152.1473

Structural Formula：   
                                                             

Standard：

Items	Specifications
Appearance	White flakes
Content	≥99.0%
Melting point	98.0℃ ~ 102.0℃
Melt color（Pt-Co）	≤80Hazen

Properties：THPA is a white flake solid. Soluble in general organic solvents, slightly soluble in petroleum ether. Melting point: 100℃, Density 1.35g/ml.

Uses：THPA is an excellent curing agent of epoxy resin. It is commonly used as a modifier of unsaturated polyester resin and alkyd resin. It can improve the adhesion, elasticity, gloss and water resistance of coatings. As a plasticizer, it can improve the cold resistance and heat resistance of PVC, and is non-toxic. THPA is also an important intermediate in the synthesis of pesticides and pharmaceuticals.

Storage：Store in a cool, ventilated, moisture-proof and light-proof place. Keep container sealed and away from fire.

Packing：25kg or 500kg bag