MS436 25MG. MS436, CAS Number: 1395084-25-9, Molecular Formula: C18H17N5O3S, Molecular Weight: 383. 42, Purity: greater than or equal to 98% by HPLC, Appearance: Red solid, Synonym: (E)-4-[2-(2-Amino-4-hydroxy-5-methylphenyl)diazenyl]-N-2-pyridinylbenzenesulfonamide, Size: 25MG