CRYSTALLINE CEPHEM CARBOXYLIC ACID ADDITION SALT

摘要

A storage stable form of the crystalline sulfate of 7-¢2-(2-aminothiazol-4-yl)-(Z)-2-methoxyiminoacetamido!-3-¢5-(2-hydroxyethyl)-4-methylthiazoliomethyl!-3-cephem-4-carboxylate has a specified X-ray diffraction pattern and is prepared by adding aqueous sulfuric acid to an aqueou6 solution of the compound under controlled conditions.