CAS Registry Number

CAS 143-74-8 — Phenol Red

Phenol Red is a synthetic pH indicator dye used in biological and chemical applications to detect pH changes in solutions, particularly in the range of 6.8–8.2, turning yellow to red. It is also employed in cell culture media and as a component in some diagnostic tests. This chemical has a CAS number of 143-74-8, a molecular formula of C19H14O5S, and a molecular weight of 354.38 g/mol. It should be stored at ambient temperatures, and it carries a signal word of *Warning* for safety. Molekula supplies Phenol Red from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

Also known as: Phenol red solution (0.5%)