Lithium thiocyanate

Lithium thiocyanate
Names
	Other names Lithium sulfocyanate;
Identifiers
CAS Number	556-65-0; monohydrate: 123333-85-7; dihydrate: 84372-58-7;
3D model (JSmol)	Interactive image; monohydrate: Interactive image; dihydrate: Interactive image;
ChemSpider	141057; monohydrate: 13998125;
ECHA InfoCard	100.008.306
EC Number	209-135-1; monohydrate: 629-475-8;
PubChem CID	23673451; monohydrate: 16211966; dihydrate: 129843620;
CompTox Dashboard (EPA)	DTXSID40883339 ;
	InChI InChI=1S/CHNS.Li/c2-1-3;/h3H;/q;+1/p-1 Key: ZJZXSOKJEJFHCP-UHFFFAOYSA-M; monohydrate: InChI=1S/CHNS.Li.H2O/c2-1-3;;/h3H;;1H2/q;+1;/p-1 Key: UNTVNJAFDYEXLD-UHFFFAOYSA-M; dihydrate: InChI=1S/CHNS.Li.2H2O/c2-1-3;;;/h3H;;2*1H2/q;+1;;/p-1 Key: TWRGRNSGEYGNBV-UHFFFAOYSA-M;
	SMILES [Li+].C(#N)[S-]; monohydrate: [Li+].C(#N)[S-].O; dihydrate: [Li+].C(#N)[S-].O.O;
Properties
Chemical formula	LiSCN
Molar mass	65.02 g/mol
Appearance	White hygroscopic solid
Density	1.44 g/cm3
Melting point	274 °C (525 °F; 547 K)
Boiling point	550 °C (1,022 °F; 823 K) (decomposition)
Solubility in water	125 g/100 ml
Solubility	Soluble in alcohol
Structure
Crystal structure	Orthorhombic (anhydrous, α-monohydrate, dihydrate); Monoclinic (β-monohydrate)
Space group	C2/m (α-monohydrate); Pnam (β-monohydrate); Pnma (anhydrous, dihydrate)
Lattice constant	a = 1215.1 pm, b = 373.6 pm, c = 529.9 pm (anhydrous)
Coordination geometry	4 (α, β-monohydrate); 6 (anhydrous, dihydrate)
Molecular shape	Tetrahederal (α and β-monohydrate)
Thermochemistry
Std molar; entropy (S⦵298)	9 e.u.
Std enthalpy of; formation (ΔfH⦵298)	5.0 kcal/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302+H312+H332, H412
NFPA 704 (fire diamond)	4 1 1
Related compounds
Other cations	Sodium thiocyanate, Potassium thiocyanate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Lithium thiocyanate is a chemical compound with the formula LiSCN. It is an extremely hygroscopic white solid that forms the monohydrate and the dihydrate. It is the least stable of the alkali metal thiocyanates due to the large electrostatic deforming field of the lithium cation.

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