CAS Registry Number

CAS 4430-20-0 — Chlorophenol Red

Chlorophenol Red is a synthetic pH indicator dye, primarily used in analytical chemistry for titrations and colorimetric pH measurements in the range of 1.2 to 2.8. It appears yellow in acidic conditions and red in alkaline environments, making it useful for detecting strong acids and monitoring pH shifts in laboratory settings. This chemical has a CAS number of 4430-20-0, with the molecular formula C19H12Cl2O5S and a molecular weight of 423.2666. It is stored at ambient conditions and carries a signal word of "Warning" for safety classification. Molekula supplies Chlorophenol Red from research to bulk quantities with full documentation and ISO 9001:2015 traceability.