Methyltetrahydrophthalic anhydride (MTHPA) is mainly used as a curing agent for epoxy resins. It has a low tendency to absorb moisture from the air and zero or minimal formation of carbon dioxide when mixed with tertiary amine accelerators.

Methyltetrahydrophthalic anhydride MTHPA can be easily blended with various liquid resins providing stable, low viscous mixture and long pot lives.
It is widely used for:

• Casting/Potting
• Impregnation
• Lamination

Synonyms:
1,3 – isobenzofurandione, tetrahydromethyl;
1,2,3,6 – Tetrahydromethylphthalic anhydride.
Methyltetrahydrophthalic anhydride;
Methyl – 4 – cyclohexene – 1,2 – dicarboxylic anhydride;