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Bible Dictionaries
Phthalein

Webster's Dictionary

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(n.) One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenol phthalein. Their alkaline solutions are fluorescent.

Bibliography Information
Webster, Noah. Entry for 'Phthalein'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/phthalein.html. 1828.
 
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