CAS 193149-74-5 appears in our catalog under these names: WST-8, WST-8/ 98.8% (existing batch purity), WST–8, WST-8 95%, 2-(2-Methoxy-4-nitrophenyl)-3-(4-nitrophenyl)-5-(2,4-disulfophenyl)-2H-tetraz.... Offered by: TRC, TargetMol, GLPBio, Biosynth, Ambeed. Available pack sizes: 1g, 25mg, 50mg, 100mg, 200mg, 10g, 10mM (in 1ml water), 0,25g.