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Electronical chemicals

Hexahydrophthalic anhydride

CAS number

85-42-7

Molecular formula C8H10O3
Product name Hexahydrophthalic anhydride
Molecular Structure

Appearance:Light Yellow Crystalline Powder or Liquid

Density:1.18

Boiling Point:145ºC (18 mmHg)

Melting Point:32-34ºC

Flash Point:143ºC

Refractive Index:1.536

Stability:Stable under normal temperatures and pressures.

Hexahydrophthalic anhydride (HHPA) is an organic acid anhydride that is used as a hardening agent in a variety of plastic, rubber, and metal applications. HHPA is an effective cross-linking agent that can improve the mechanical properties of a material. It is a white, odorless powder that is soluble in organic solvents.


HHPA is used to improve the heat resistance, abrasion resistance, and flexibility of plastics and rubbers. It is also used to improve the hardness and strength of metal parts. HHPA can be used in a variety of applications, including adhesives, coatings, sealants, and automotive parts.


HHPA is a safe and effective hardening agent that can improve the mechanical properties of a variety of materials. It is an economical and easy-to-use product that is widely used in the plastics and rubber industries.


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