CAS Registry Number

CAS 63451-28-5 — Methyl red hydrochloride

Methyl red hydrochloride is a synthetic pH indicator dye used primarily in acid-base titrations, biological staining, and analytical chemistry to detect pH changes between 4.4 and 6.2, shifting from red to yellow. This chemical has a CAS number of 63451-28-5, a molecular formula of (CH3)2NC6H4N=NC6H4CO2H·HCl, and a molecular weight of 305.76 g/mol. It should be stored at ambient conditions and carries a signal word of Danger due to its hazardous nature. Molekula supplies Methyl red hydrochloride from research to bulk quantities with full documentation and ISO 9001:2015 traceability.