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| 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.
