hexahydrophthalic anhydride, HHPA, Hexahydrophthalic Anhydride, Cyclohexane-1,2-dicarboxylic anhydride, Hexahydrophthalic Anhydride, Hexahydrophtalic Anhydride, Hexa hydrophthalic anhydride >99%, 1,2-Cyclohexane-dicarboxylic anhydride (HHPA), >98%, Rikacid HH, HEXAHYDROPHTHALIC ANHYDRIDE (C-1234), HEXAHYDRO-PHTHALIC-ANHYDRIDE CN