Blue Coloring Matter

There is 1 exact and 122 possible answers.

We've checked our database and believe the answer is LITMUS which was last seen in the New York Times crossword.
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We think the answer to this crossword clue is: LITMUS

Updated: October 11, 2023

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Expand?		Letters	Answer	Clue
	99%	6		Exact Match!
	noun • a coloring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutions; used as a very rough acid-base indicator
	46%	8		Deep blue coloring matter
	noun • Any of a series of blue, bluish-red and black dyestuffs, formed by the interaction of para-amino azo compounds with primary monoamines in the presence of a small quantity of a mineral acid.
	40%	10		Blue coloring matter obtained from plants
	noun • a blue dye obtained from plants or made synthetically

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Clue Last Found In...

Source	#Number	Answer
New York Times13 Nov 2004	Across 43
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