M(2-mercapto-benzimidazole) CAS No.:583-39-1 Trade name:M Chemical name:2-mercapto-benzimidazole Molecular formula:C7H6SN2 Assay:95% Appearance:White crystal melting point:303-304°C Usage:0.6-1.0mg/l Application: It is soluble in alkaline solution and used as brightener for copper plating, which can brighten and level the deposit. In addition, It can improve working current density.It is often combined with N,SPS.