Butylchlorodihydroxytin Identification Cas no.: 13355-96-9 Molecular formula: c4h11clo2sn Molecular weight: 245.29 Specification Appearance: white powder Tin content: 47.0-49.0% Ci content: 13.70-15.30 Water: 0.5% max Application 1. It is a kind of efficient esterification catalyst of organic tin at the temperature from degree to 230 degree. 2. It will dissolve when the alcohol or carboxylic acid is in the heating reaction. The catalyst in the reaction will dissolve in the ester 3. It is widely used in the synthesis reaction of saturated and unsaturated polyester. Package 25kgs / drum