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1,2-Cyclohexanedicarboxylic acid, 4-methyl- (4-MHHPAc)

Half-life for reaction with photochemically-produced hydroxyl radicals: 30.1 hours.

Overall degradation rate constant with OH radicals= 1.28E-11 cm3/(molecule-sec).

Hexahydro-4-methylphthalic anhydride (4-MHHPA)

Half-life for reaction with photochemically-produced hydroxyl radicals: 45.3 hours.

Overall degradation rate constant with OH radicals= 8.51E-12 cm3/(molecule-sec).

Hydrolysis: Half life - at ph 4: 1.43 minutes at 20 deg C; 2.04 minutes at 30 deg C and 0.692 minutes at 50 deg C. at ph 7: 1.90 minutes at 20 deg C; 1.26 minutes at 30 deg C and 0.327 minutes at 50 deg C. at ph 9: 1.27 minutes at 20 deg C; 1.18 minutes at 30 deg C and 0.233 minutes at 50 deg C.