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[fee-nawl-suhl-fohn-thal-een, -ee-in, -fthal-, -nol-] /ˌfi nɔlˌsʌl foʊnˈθæl in, -i ɪn, -ˈfθæl-, -nɒl-/

noun, Chemistry.
a bright to dark red crystalline compound, C 1 9 H 1 4 O 5 S, slightly soluble in water, alcohol, and acetone: used as an acid-base indicator and as a diagnostic reagent in medicine.


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