alkali blue

noun

1
: any of various alkali-soluble triphenylmethane dyes that are essentially sodium salts of monosulfonic acids of phenylated pararosaniline and are used chiefly in making pigments
2
: any of the fairly permanent pigments made from an alkali blue dye and used chiefly in printing inks

Word History

First Known Use

1864, in the meaning defined at sense 1

Time Traveler
The first known use of alkali blue was in 1864

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Cite this Entry

“Alkali blue.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alkali%20blue. Accessed 23 Apr. 2024.

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