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Potassium amyl xanthate

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Potassium amyl xanthate
Names
Preferred IUPAC name Potassium O-pentyl carbonodithioate
Other names potassium pentylxanthogenate
potassium-O-pentyl dithiocarbonate
Identifiers
CAS Number
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.018.481 Edit this at Wikidata
EC Number
  • 220-329-5
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/C6H12OS2.K/c1-2-3-4-5-7-6(8)9;/h2-5H2,1H3,(H,8,9);/q;+1/p-1Key: YIBBMDDEXKBIAM-UHFFFAOYSA-M
  • InChI=1S/C6H12OS2.K/c1-2-3-4-5-7-6(8)9;/h2-5H2,1H3,(H,8,9);/q;+1/p-1
SMILES
  • CCCCCOC(=S).
Properties
Chemical formula C6H11KOS2
Molar mass 202.37 g·mol
Appearance Pale yellow or yellow powder
Density 1.073 g/cm3
Solubility in water Soluble
Hazards
GHS labelling:
Pictograms GHS02: FlammableGHS07: Exclamation markGHS09: Environmental hazard
Signal word Warning
Hazard statements H228, H302, H312, H315, H319, H335, H411
Precautionary statements P210, P240, P241, P261, P264, P270, P271, P273, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P312, P321, P322, P330, P332+P313, P337+P313, P362, P363, P370+P378, P391, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). checkY verify (what is  ?) Infobox references
Chemical compound

Potassium amyl xanthate (/pəˈtæsiəm ˌæmɪl ˈzænθeɪt/) is an organosulfur compound with the chemical formula CH3(CH2)4OCS2K. It is a pale yellow powder with a pungent odor that is soluble in water. It is widely used in the mining industry for the separation of ores using the flotation process.

Production and properties

As typical for xanthates, potassium amyl xanthate is prepared by reacting n-amyl alcohol with carbon disulfide and potassium hydroxide.

CH3(CH2)4OH + CS2 + KOH → CH3(CH2)4OCS2K + H2O

Potassium amyl xanthate is a pale yellow powder. Its solutions are relatively stable between pH 8 and 13 with a maximum of stability at pH 10.

Related compounds

  • Sodium amyl xanthate is used in the separation of nickel and copper from their ores.

Safety

The LD50 is 90-148 mg/kg (oral, rat).

It is a biodegradable compound.

References

  1. Charles C. Price and Gardner W. Stacy (1948). "p-nitrophenyl sulfide". Organic Syntheses. 28: 82; Collected Volumes, vol. 3, p. 667.
  2. J. Dyer, L. H. Phifer, Macromolecules 2 (1969) 111. R. J. Millican, C. K. Sauers, J. Org. Chem. 44 (1979) 1964.
  3. Kerfoot, Derek G. E. (2005). "Nickel". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a17_157. ISBN 978-3527306732.
  4. Kathrin-Maria Roy "Xanthates" in Ullmann's Encyclopedia of Industrial Chemistry 2005, Wiley-VCH, Weinheim.
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