4-pyridylmercapto acetyl chloride hydrochloride (PMAC) Chemical name: 4-pyridylmercapto acetyl chloride hydrochloride Molecular formula: C7H7Cl2NOS Molecular weight: 224.11 CAS NO.: 27230-51-9 Appearance: off white crystalline solid Assay: not less than 96% Iron content: not more than 100ppm Usage: cefapirin intermediate 25kg/drum