Picramic acid

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Science and technology

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What Wikipedia says

Picramic acid, also known as 2-amino-4,6-dinitrophenol, is an acid obtained by neutralizing an alcoholic solution of picric acid with ammonium hydroxide. Hydrogen sulfide is then added to the resulting solution, which turns red, yielding sulfur and red crystals.

Excerpt from the Wikipedia article “Picramic acid”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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