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| 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.
