CAS Registry Number

CAS 129-17-9 — Patent Blue V

Patent Blue V is a synthetic triarylmethane dye primarily used in medical diagnostics, food coloring, and biological staining. It is commonly employed as a vital stain in surgery to identify lymph nodes and sentinel nodes, as well as in food products under the designation E131. This chemical has a CAS number of 129-17-9, with the molecular formula C27H31N2NaO6S2 and a molecular weight of 566.66. It should be stored at ambient conditions. The product is classified with a signal word of "Danger" due to its potential hazards. Molekula supplies Patent Blue V from research to bulk quantities with full documentation and ISO 9001:2015 traceability.