Potassium cyanate

Potassium cyanate

Properties
General
NamePotassium cyanate
AppearanceWhite powder
CAS registry number590-28-3

Physical Attributes

Molar mass81.12 g/mol
Melting point700 °C
Boiling point
Density2.05 ×103 kg/m3
Crystal structure
Solubility75 g in 100g water

Thermochemistry

May cause irritation.
EyesMay cause irritation, redness and pain.
More info [http://www.jtbaker.com/msds/englishhtml/p5697.htm MSDS]
Except where noted, all data was produced under conditions of standard temperature and pressure.
Potassium cyanate is an inorganic compound with the formula KOCN. It is the conjugate base of cyanic acid, HOCN. This reagent is used to prepare herbicide. Worldwide production of the potassium and sodium salts was 20 Mkg in 2006.Peter M. Schalke1, "Cyanates, Inorganic Salts" Ullmann's Encyclopedia of Industrial Chemistry2006, Wiley-VCH, Weinheim. DOI|10.1002/14356007.a08_157.pub2. Article Online Posting Date: July 15, 2006]

Preparation

KOCN is prepared urea with potassium carbonate at 400 °C::2 OC(NH2)2 + K2CO3 → 2 KOCN + (NH4)2CO3The reaction produces a liquid. Intermediates and impurities include biuret, cyanuric acid, and potassium allophanate (KO2CNHC(O)NH2), as well as unreacted starting urea, but these species are unstable at 400 °C.

Potassium cyanate is often preferred to the sodium salt which is less soluble in water.

References

External links

* [http://www.catalogue.fisher.co.uk/scripts/search.dll?ViewMSDS&SheetNumber=88624 MSDS]


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