thiourea

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Scope note
Shiny white crystalline compound used in photography as a toner and to remove stains from negatives. Capable of dissolving silver salts, thiourea is often an active ingredient in silver-dip tarnish removal solutions. It is also used to accelerate the vulcanization of rubber. Its composition is the same as that of urea but with a sulfur atom in place of the oxygen atom.
thiourea
Accepted term: 13-May-2024