Sulphonthal
PubChem Notes:
Phenolsulfonphthalein Red dye, pH indicator, and diagnostic aid for determination of renal function. It is used also for studies of the gastrointestinal and other systems.
MediLexicon phenolsulfonphthalein - Medical Dictionary Definition for Term 'phenolsulfonphthalein'
[1. An indicator in tissue culture media (yellow at pH 6.8, red at pH 8.4); occurs as a bright to dark red crystalline powder; in the past given by parenteral injection as a test for renal function.
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