PSP -->
phenolsulfonphthalein
medical dictionary

<chemical>

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

Abbreviation: PSP

(12 Dec 1998)