1. Noun. A pH indicator and red dye used to test kidney function. ¹
¹ Source: wiktionary.com
Medical Definition of Phenol red
1. 4,4'-(3h-2,1-benzoxathiol-3-ylidene)bisphenol s,s-dioxide. Red dye, pH indicator, and diagnostic aid for determination of renal function. It is used also for studies of the gastrointestinal and other systems.
Pharmacological action: indicators and reagents, phthalein dyes.
Chemical name: Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis-, S,S-dioxide
(12 Dec 1998)
