/thuy'oh yoo ree"euh, -yoor"ee euh/, n. Chem.
a colorless, crystalline, bitter-tasting, water-soluble solid, CH4N2S, derived from urea by replacement of the oxygen with sulfur: used chiefly in photography, inorganic synthesis, and to accelerate the vulcanization of rubber. Also called thiocarbamide.
[1890-95; < NL; see THIO-, UREA]

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also called  thiocarbamide 

      an organic compound that resembles urea (q.v.) but contains sulfur instead of oxygen; i.e., the molecular formula is CS(NH2)2, while that of urea is CO(NH2)2. Like urea, it can be prepared by causing a compound with the same chemical composition to undergo rearrangement, as by heating ammonium thiocyanate (NH4SCN). A method of preparation more commonly used consists of the addition of hydrogen sulfide to cyanamide. Thiourea exhibits many of the chemical properties of urea, but it has little commercial application. The small quantity of thiourea consumed is utilized primarily in photography as a fixing agent, in the manufacture of a thermosetting resin, as an insecticide, as a textile-treating agent, and as starting material for certain dyes and drugs. Thiourea forms as colourless crystals melting at 182° C (360° F). It is toxic, although the fatal dosage is not well established.

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Universalium. 2010.

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Look at other dictionaries:

  • thiourea — [thī΄ōyo͞o rē′ə, thī΄ōyoor′ē ə] n. [ModL: see THIO & UREA] a colorless, crystalline chemical compound, CS(NH2) 2, used in organic synthesis, in photography, etc …   English World dictionary

  • Thiourea — Chembox new ImageFile=thiourea.png ImageSize= ImageFile2=Thiourea 3D vdW.png IUPACName=thiourea OtherNames= Section1= Chembox Identifiers CASNo=62 56 6 PubChem=2723790 SMILES=C(=S)(N)N Section2= Chembox Properties Formula=CH4N2S MolarMass=76.1219 …   Wikipedia

  • Thiourea — Strukturformel Allgemeines Name Thioharnstoff Andere Namen Thiocarbamid Sulfoharnstoff …   Deutsch Wikipedia

  • thiourea — tiokarbamidas statusas T sritis chemija formulė S=C(NH₂)₂ atitikmenys: angl. thiocarbamide; thiourea rus. тиокарбамид; тиомочевина …   Chemijos terminų aiškinamasis žodynas

  • thiourea — noun Etymology: New Latin Date: 1884 a colorless crystalline bitter compound CS(NH2)2 analogous to and resembling urea that is used especially as a photographic and organic chemical reagent; also a substituted derivative of this compound …   New Collegiate Dictionary

  • thiourea — noun /θaɪoʊyʊˈriə, ˈyʊəriə/ Any of a class of compounds based on NH CS NH formally derived from urea by replacing the oxygen atom with sulfur. It finds uses in photography as a fixing agent, in inorganic synthesis, and in medicine as an… …   Wiktionary

  • thiourea — An antithyroid compound of the thioamide group, with the same actions and uses as thiouracil. Several derivatives of t. are useful in the treatment of leprosy. SYN: thiocarbamide. * * * thio·urea yu̇ rē ə n a colorless bitter crystalline compound …   Medical dictionary

  • thiourea — n. chemical compound used in photography and organic synthesis …   English contemporary dictionary

  • thiourea — thio·urea …   English syllables

  • thiourea — thi•o•u•re•a [[t]ˌθaɪ oʊ yʊˈri ə, ˈyʊər i ə[/t]] n. chem. a colorless, solid substance, CH4N2used in photography and inorganic synthesis • Etymology: 1890–95 …   From formal English to slang

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