phenolphthalein

[ fee-nawl-thal-een, -ee-in, -fthal-, -nol- ]

/ ˌfi nɔlˈθæl in, -i ɪn, -ˈfθæl-, -nɒl- /

noun Chemistry, Pharmacology.

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

Origin of phenolphthalein

First recorded in 1870–75; phenol + phthalein

Words nearby phenolphthalein

phenol coefficient, phenolic, phenolic resin, phenolion, phenology, phenolphthalein, phenol red, phenolsulfonephthalein, phenolsulfonphthalein, phenom, phenomena

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for phenolphthalein

If only perfectly fresh milk is used, the amount of acid will generally be about 0.15 per cent with phenolphthalein as indicator.
Outlines of Dairy Bacteriology, 8th edition|H. L. Russell
Phecolax contains, in addition to the ingredients of Phecolates, phenolphthalein and cascarin, of each one-half grain.
The Propaganda for Reform in Proprietary Medicines, Vol. 1 of 2|Various
Taurocol is a combination of bile salts, extracts of cascara sagrada, phenolphthalein and aromatics.
The Propaganda for Reform in Proprietary Medicines, Vol. 1 of 2|Various
Note:—The potassium oxalate and the formalin must both be neutral to phenolphthalein.
The Starvation Treatment of Diabetes|Lewis Webb Hill

The diluted solution is acid in reaction toward litmus and phenolphthalein and alkaline toward methyl orange.
The Propaganda for Reform in Proprietary Medicines, Vol. 2 of 2|Various

British Dictionary definitions for phenolphthalein

phenolphthalein

/ (ˌfiːnɒlˈθeɪliːn, -lɪɪn, -ˈθæl-) /

noun

a colourless crystalline compound used in medicine as a laxative and in chemistry as an indicator. Formula: C 20 H 14 O 4

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for phenolphthalein

phenolphthalein

[ fē′nōl-thăl′ēn′, -thăl′ē-ĭn, -thā′lēn′, -thā′lē-ĭn ]

n.

A white or pale yellow crystalline powder that is used as an acid-base indicator and a laxative.

Scientific definitions for phenolphthalein

phenolphthalein

[ fē′nōl-thăl′ēn′ ]

A white or pale-yellow, crystalline powder used as an indicator for acid and basic solutions. In solutions that are either neutral or basic, it is colorless, while it is pink or red in solutions that are alkali. It is also used as a laxative and in making dyes. Chemical formula: C20H14O4.

单词	phenolphthalein
释义	phenolphthalein [ fee-nawl-thal-een, -ee-in, -fthal-, -nol- ] / ˌfi nɔlˈθæl in, -i ɪn, -ˈfθæl-, -nɒl- / noun Chemistry, Pharmacology. a white, crystalline compound, C20H14O4, used as an indicator in acid-base titration and as a laxative. Origin of phenolphthalein First recorded in 1870–75; phenol + phthalein Words nearby phenolphthalein phenol coefficient, phenolic, phenolic resin, phenolion, phenology, phenolphthalein, phenol red, phenolsulfonephthalein, phenolsulfonphthalein, phenom, phenomena Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for phenolphthalein If only perfectly fresh milk is used, the amount of acid will generally be about 0.15 per cent with phenolphthalein as indicator. Outlines of Dairy Bacteriology, 8th edition\|H. L. Russell Phecolax contains, in addition to the ingredients of Phecolates, phenolphthalein and cascarin, of each one-half grain. The Propaganda for Reform in Proprietary Medicines, Vol. 1 of 2\|Various Taurocol is a combination of bile salts, extracts of cascara sagrada, phenolphthalein and aromatics. The Propaganda for Reform in Proprietary Medicines, Vol. 1 of 2\|Various Note:—The potassium oxalate and the formalin must both be neutral to phenolphthalein. The Starvation Treatment of Diabetes\|Lewis Webb Hill The diluted solution is acid in reaction toward litmus and phenolphthalein and alkaline toward methyl orange. The Propaganda for Reform in Proprietary Medicines, Vol. 2 of 2\|Various British Dictionary definitions for phenolphthalein phenolphthalein / (ˌfiːnɒlˈθeɪliːn, -lɪɪn, -ˈθæl-) / noun a colourless crystalline compound used in medicine as a laxative and in chemistry as an indicator. Formula: C 20 H 14 O 4 Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for phenolphthalein phenolphthalein [ fē′nōl-thăl′ēn′, -thăl′ē-ĭn, -thā′lēn′, -thā′lē-ĭn ] n. A white or pale yellow crystalline powder that is used as an acid-base indicator and a laxative. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for phenolphthalein phenolphthalein [ fē′nōl-thăl′ēn′ ] A white or pale-yellow, crystalline powder used as an indicator for acid and basic solutions. In solutions that are either neutral or basic, it is colorless, while it is pink or red in solutions that are alkali. It is also used as a laxative and in making dyes. Chemical formula: C20H14O4. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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