Difference between revisions of "Indicator dye"
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== Description == | == Description == | ||
| − | An organic colorant that exhibits different colors in acidic and alkaline solutions. Indicator dyes are used to determine [ | + | An organic colorant that exhibits different colors in acidic and alkaline solutions. Indicator dyes are used to determine [[pH]] values. Examples are natural indicators are [[archil]], [[litmus]], [[turnsole]], and [[logwood]]. Some synthetic indicator dyes are [[phenolphthalein]], [[dinitrophenol]], [[bromcresol green]] and [[chlorophenol red]]. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 14:51, 16 January 2014
Description
An organic colorant that exhibits different colors in acidic and alkaline solutions. Indicator dyes are used to determine PH values. Examples are natural indicators are Archil, Litmus, Turnsole, and Logwood. Some synthetic indicator dyes are Phenolphthalein, Dinitrophenol, Bromcresol green and Chlorophenol red.
Synonyms and Related Terms
Farbindikator (Deut.); indicador ácido-base (Esp., Port.); indicateur coloré (Fr.); acid-base indicator
Authority
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- R.D. Harley, Artists' Pigments c. 1600-1835, Butterworth Scientific, London, 1982
- Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982