Methyl hexahydrophthalic anhydride

Methyl Hexahydrophthalic Anhydride (MHHPA, CAS 25550-51-0) is a cycloaliphatic anhydride supplied as a low-viscosity liquid. It carries no assigned E-code and is commonly abbreviated as MHHPA in industrial formulation contexts. It belongs to the phthalic anhydride derivative family within the polymers and resins category.

MHHPA functions primarily as a curing agent for epoxy resin systems, where it reacts with epoxide groups to form ester linkages that build a cross-linked polymer network. In electronics encapsulation and LED optics, it produces cured systems with good optical clarity and thermal stability. In coatings and adhesives, it controls cure rate and final film hardness through stoichiometric adjustment.

MHHPA is available in industrial liquid grades and is subject to REACH registration requirements for supply within the European Economic Area. It is classified under HS code 29329990 for customs purposes. Procurement teams should request a current Safety Data Sheet and technical data sheet to confirm grade specification and packaging format.