CAS Number: 2754-41-8

Synonyms:

• 1,2,4,5 – Cyclohexane tetracarboxylic dianhydride
• Hexahydro-1H,3H-benzo[1,2-c:4,5-c’]difuran-1,3,5,7-tetrone

CHDA is a cycloaliphatic dianhydride, capable of producing low-color polymer films, especially when used in combination with other cycloaliphatic and fluorine containing co-monomers. Its structure is analogous to PMDA’s, but with an aliphatic ring.  Its melting point is about 240°C. Polyimides made from CHDA are more flexible vs. the analogous PMDA structure. CHDA-based polyimide films provide high dielectric performance and are used in select electronic applications.