CAS Registry Number

CAS 91-95-2 — 3,3'-Diaminobenzidine

3,3'-Diaminobenzidine (DAB) is a tetraamine compound widely used as a chromogenic substrate in immunohistochemistry and histochemistry for detecting peroxidase activity, producing a brown precipitate. It is also employed in chemical synthesis, particularly for dyes and polymers. CAS 91-95-2, molecular formula (NH₂)₂C₆H₃C₆H₃(NH₂)₂, molecular weight 214.27 g/mol. Store at 2–8°C. Hazardous—handle with care (signal word: Danger). Molekula supplies 3,3'-Diaminobenzidine from research to bulk quantities with full documentation and ISO 9001:2015 traceability.