CAS Registry Number: 139481-59-7 CAS Name: 2-Ethoxy-1-[[2' -(1 H -tetrazol-5-yl)[1,1' -biphenyl]-4-yl]methyl]-1 H -benzimidazole-7-carboxylic acid Molecular Formula: C 24 H 20 N 6 O 3 Molecular Weight: 440.45. Melting point: mp 183-185? Specification: Characteristics A white or almost white crystalline powder Identification Must complies Loss on drying :not more than 0.4% Heavy metals: not more than 20ppm Residue on ignition: not more than 0.1% Related substances(HPLC) Individual impurity: not more than 0.5% Total impurity: not more than 1.0% Assay: 98.0-102 . 0 %