phenolsulfonephthalein


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Related to phenolsulfonephthalein: phenolsulfonphthalein

phe•nol•sul•fone•phthal•ein

(ˌfi nɔlˌsʌl foʊnˈθæl in, -i ɪn, -ˈfθæl-, -nɒl-)

n.
a bright to dark red crystalline compound, C19H14O5S, slightly soluble in water, alcohol, and acetone: used as an acid-base indicator and as a diagnostic reagent in medicine. Also called phe′nol red′.