The CIS trans mixture of 1,4-cyclohexanedicarboxylic acid is a white crystal, which is soluble in organic solvents such as ethanol, acetone and chloroform. Trans-1,4-cyclohexanedicarboxylic acid is a white phosphorus columnar crystal with lower solubility in water than cis-1,4-cyclohexanedicarboxylic acid. Cis-1,4-cyclohexanedicarboxylic acid is a white leaf crystal with considerable solubility in water. This product is used to synthesize peptic ulcer medicine in medicine and modify monomer in polyester resin to improve yellowing and softness of polyester resin without changing hardness.