Thiocyanic acid

Thiocyanic acid^[1]
Names
	Other names Hydrogen thiocyanate; Sulfocyanic acid; Sulfocyanide
Identifiers
CAS Number	463-56-9;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.006.672
PubChem CID	781;
CompTox Dashboard (EPA)	DTXSID7047221 ;
	SMILES SC#N;
Properties
Chemical formula	CHNS
Molar mass	59.09 g·mol−1
Solubility in water	Miscible
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Thiocyanic acid is a chemical compound with the formula HSCN that exists as a mixture with the isomeric compound isothiocyanic acid (HNCS).^[2] It is the sulfur analog of cyanic acid (HOCN).

HSCN is predicted to have a triple bond between carbon and nitrogen. It has been observed spectroscopically but has not been isolated as a pure substance.^[3]

The salts and esters of thiocyanic acid are known as thiocyanates. The salts are composed of the thiocyanate ion (^-SCN) and a suitable metal cation (e.g., potassium thiocyanate, KSCN). The esters of thiocyanic acid have the general structure R-SCN.

References

^ Merck Index, 11th Edition, 9257.
^ Holleman, A. F.; Wiberg, E. Inorganic Chemistry Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
^ Wierzejewska, M.; Mielke, Z. (2001). "Photolysis of Isothiocyanic Acid HNCS in Low-Temperature Matrices. Infrared Detection of HSCN and HSNC Isomers". Chemical Physics Letters. 349: 227–234.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[1] Merck Index, 11th Edition, 9257.

[2] Holleman, A. F.; Wiberg, E. Inorganic Chemistry Academic Press: San Diego, 2001. ISBN 0-12-352651-5.

[3] Wierzejewska, M.; Mielke, Z. (2001). "Photolysis of Isothiocyanic Acid HNCS in Low-Temperature Matrices. Infrared Detection of HSCN and HSNC Isomers". Chemical Physics Letters. 349: 227–234.{{cite journal}}: CS1 maint: multiple names: authors list (link)

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