Phenolsulfonphthalein
Synonyms
Phenol Red
Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis-, S,S-dioxide
Sulfonphthal
Sulphental
Sulphonthal
Red dye, pH indicator, and diagnostic aid for determination of renal function. It is used also for studies of the gastrointestinal and other systems.