White powder, molecular weight 554.82, melting point 181ºC, soluble in acetone, ethanol, ethyl acetate and others organic solvents but insoluble in water. CA is a high effcient phenolic antioxidant, it usedas stabilizer and antioxidant for polymers(PS, PP, PE, PVC, PAN, ABS and fiber plastics), CA has low volatility, No pollution, discoloration, and decompose under high temperature process. Beside, CA could inhibit copper harm and apply in pololefin cable production. Combination use with DLTDP, DSTDP and UV absorber, shows excellent synthesiza effect. The dosage is 0.02-0.5%.