variants: or phenolsulfonphthalein \ ¦⸗ˌ⸗¦⸗ˌ⸗¦⸗(⸗)⸗ \

Definition of phenolsulfonephthalein

: a red crystalline compound C19H14O5S formed by condensation of the anhydride of ortho-sulfobenzoic acid and phenol and used chiefly as a test of kidney function and as an acid-base indicator

called also phenol red

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History and Etymology for phenolsulfonephthalein

International Scientific Vocabulary phenol + sulfonephthalein or sulfonphthalein

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Cite this Entry

“Phenolsulfonephthalein.” Dictionary, Merriam-Webster, Accessed 14 Apr. 2021.

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