phthalein


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phthal·ein

also phthal·eine  (thăl′ēn′, thăl′ē-ĭn, thā′lēn′, thā′lē-ĭn, fthăl′-)
n.
Any of a group of chemical compounds formed by a reaction of phthalic anhydride with a phenol, from which certain synthetic dyes are derived.

phthalein

(ˈθeɪliːn; -lɪɪn; ˈθæl-; ˈfθæl-)
n
(Elements & Compounds) any of a class of organic compounds obtained by the reaction of phthalic anhydride with a phenol and used in dyes
[C19: from phthal-, shortened form of naphthalene +-in]

phthal•ein

(ˈθæl in, -i ɪn, ˈfθæl-)

n.
any of a group of compounds formed by treating phthalic anhydride with phenols, from which certain important dyes are derived.
[1900–05; (na) phthale (ne) + -in1]
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