Patent ID: 7595423

Claim:
A trans-1,4-cyclohexanedicarboxylic acid composition comprising trans-1,4-cyclohexanedicarboxylic acid in an amount of 90% or higher, wherein a transmittance of the trans-1,4-cyclohexanedicarboxylic acid composition at 340 nm is 85% or higher when the transmittance is determined by examining an alkali solution, which is prepared by dissolving 1 g of the trans-1,4-cyclohexanedicarboxylic acid composition in 10 mL of 2N KOH solution, with a spectrophotometer using a quartz cell having a thickness of 1 cm; and the trans-1,4-cyclohexanedicarboxylic acid composition further comprises trans-4-methylcyclohexanecarboxylic acid in an amount ranging from 0.2 to 0.9 wt %.