A procedure for preparing zilpaterol hydrochloride in a Crystalline form and a product that contains clorihidratro of zilpaterol obtained by Said method.

摘要

The Invention aims at clohidrato of anhydrous zilpaterol in CRYSTALLIZED form, characterized in that it comprises less than 5% of Crystals with a size less than 15 micrometers.Taking the rest of the Crystals size Lower A250 micrometers. The product is used comoaditivo Foods for Weight gain in Livestock animals.