Litmus Paper Definition

Chemistry Glossary Definition of Litmus Paper

Litmus paper
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Litmus Paper Definition: ​

Filter paper which has been treated with a natural water-soluble dye obtained from lichens. The resulting piece of paper, called 'litmus paper', can be used as a pH indicator. Blue litmus paper turns red under acidic conditions (pH below 4.5) while red litmus paper turns blue under alkaline conditions (pH above 8.3). Neutral litmus paper is purplish in color.

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Your Citation
Helmenstine, Anne Marie, Ph.D. "Litmus Paper Definition." ThoughtCo, Feb. 10, 2017, Helmenstine, Anne Marie, Ph.D. (2017, February 10). Litmus Paper Definition. Retrieved from Helmenstine, Anne Marie, Ph.D. "Litmus Paper Definition." ThoughtCo. (accessed April 23, 2018).