Butylchlorodihydroxytin also known as Butyltin chloride dihydroxide, butyl(chloro)stannanediol, is one of several organotin compounds which are active as an esterification catalysts at a temperature range of 200-230 °C. It is a non-acidic white solid which has C4H11ClO2Sn as chemical formula. It dissolves by reaction on heating with alcohols or carboxylic acids. The resulting active is soluble in ester systems and remains in the ester product.
