CAS Registry Number

CAS 4196-99-0 — Biebrich Scarlet

Biebrich Scarlet is a bright red azo dye, primarily used in microscopy and histology for staining biological tissues and cells. It binds to proteins and nucleic acids, providing contrast for light microscopy applications. This chemical has a CAS number of 4196-99-0, with the molecular formula C22H14N4Na2O7S2 and a molecular weight of 556.48. It is stored at ambient conditions and carries a signal word of *Warning* for safety. Molekula supplies Biebrich Scarlet from research to bulk quantities with full documentation and ISO 9001:2015 traceability.