phenolphthalein

/fee-nawl-thal-een, -ee-in, -fthal-, -nol-/US // ˌfi nɔlˈθæl in, -i ɪn, -ˈfθæl-, -nɒl- //UK // (ˌfiːnɒlˈθeɪliːn, -lɪɪn, -ˈθæl-) //

酚酞,苯酚酞,酚酞类,酚酞类药物

Definitions

n.名词 noun

1
Chemistry, Pharmacology.
- : a white, crystalline compound, C20H14O4, used as an indicator in acid-base titration and as a laxative.

It is undoubtedly true, however, as we have previously stated, that phenolphthalein is worthy of a trial.
The first page mentioned discusses the introduction of phenolphthalein into medicine.
Then boil for two minutes, neutralize exactly with dilute acetic acid (use phenolphthalein as the indicator).
Mould growth, on the other hand, is most vigourous in media that are strongly acid to phenolphthalein.
Litmus is insensitive to many weak organic acids the presence of which is readily indicated by phenolphthalein.