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Electronical chemicals

cis-1,2,3,6-Tetrahydrophthalic anhydride

CAS number

935-79-5

Molecular formula C8H8O3
Product name cis-1,2,3,6-Tetrahydrophthalic anhydride
Molecular Structure

Appearance:White to cream crystalline powder

Density:1.375 g/cm3

Boiling Point:195ºC 5mm

Melting Point:98-102ºC

Flash Point:156ºC

Refractive Index:1.529

Stability:Stable under normal temperatures and pressures. May decompose on exposure to moist air or water.

Storage Condition:Keep container closed when not in use. Store protected from moisture.

Vapor Pressure:0.001mmHg at 25°C

Cis-1,2,3,6-Tetrahydrophthalic anhydride is an anhydride produced by the reaction of maleic anhydride with terephthalic acid in a process known as Friedel-Crafts acylation. This product has a wide range of applications in the plastics, elastomers and adhesives industries.


The anhydride is a white to light yellow crystalline solid with a melting point of approximately 150 degrees Celsius. It has a very low vapor pressure and is soluble in most organic solvents such as acetone, ether, and ethanol. It is relatively stable to heat and light and has a low odor.


Cis-1,2,3,6-Tetrahydrophthalic anhydride is used as a cross-linking agent in the production of thermoset plastics and elastomers. It is also used as a curing agent for epoxy resins, and as a hardener for some polyurethanes. In the adhesives industry, it is used as a cross-linking agent to improve the strength and durability of the adhesive bond.


Cis-1,2,3,6-Tetrahydrophthalic anhydride is a versatile and effective cross-linking agent for a wide range of applications. It is an economical and safe alternative to other anhydrides, and it has been proven to be an effective and reliable cross-linking agent.


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