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phthalein
[ thal-een, -ee-in, fthal- ]
noun
Chemistry.
- any of a group of compounds formed by treating phthalic anhydride with phenols, from which certain important dyes are derived.
phthalein
/ ˈθæl-; ˈfθæl-; -lɪɪn; ˈθeɪliËn /
noun
- any of a class of organic compounds obtained by the reaction of phthalic anhydride with a phenol and used in dyes
phthalein
/ ³Ù³óă±ô′ŧ²Ô′,³Ù³óÄå′lÄ“n′,f³Ù³óă±ô′- /
- Any of a group of chemical compounds formed by a reaction of phthalic anhydride with a phenol. They are used to derive certain synthetic dyes.
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˜yÐÄvlog History and Origins
Origin of phthalein1
First recorded in 1900–05; (na)phthale(ne) + -in 2
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˜yÐÄvlog History and Origins
Origin of phthalein1
C19: from phthal-, shortened form of naphthalene + -in
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Example Sentences
Examples have not been reviewed.
Phthalein, thal′e-in, n. one of a very important class of dye-yielding materials formed by the union of phenols with the anhydride of phthalic acid.—adj.
From
Phthal′in, a colourless crystalline compound obtained by reducing phthalein.
From
The phthalein on the day following the second venesection was 45 per cent in two hours.
From
The phthalein excretion is normal or only slightly reduced.
From
The phthalein elimination was 65 per cent in two hours.
From
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