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Albendazole EP Impurity B Catalogue No. - VL960002 CAS No. - 54029-12-8 Molecular Formula - C12H15N3O3S Molecular Weight - 281.33 IUPAC Name - Methyl[5-Propylsulphonyl)-1H-benzimidazol-2-yl]carbamate; Albendazole Oxide Synonyms - Albendazole Sulfoxide