Silver thiocyanate

Silver thiocyanate is the silver salt of thiocyanic acid with the formula AgSCN. Silver thiocyanate appears as a white crystalline powder. It is very commonly used in the synthesis of silver nanoparticles. Additionally, studies have found silver nanoparticles to be present in saliva present during the entire digestive process of silver nitrate. Silver thiocyanate is slightly soluble in water, with a solubility of 1.68 x 10−4 g/L. It is insoluble in ethanol, acetone, and acid.

Silver thiocyanate
Names
IUPAC name
Silver(I) thiocyanate, Silver thiocyanate
Other names
Thiocyanic acid, silver (1+) thiocyanate; Silver isothiocyanate; Silver sulphocyanide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.015.395
EC Number
  • 216-934-9
UNII
UN number 3077
  • InChI=1S/CHNS.Ag/c2-1-3;/h3H;/q;+1/p-1 Y[inchi]
    Key: RHUVFRWZKMEWNS-UHFFFAOYSA-M Y[inchi]
  • C(#N)[S-].[Ag+]
Properties
AgSCN
Appearance Colorless crystals
Odor Odorless
Melting point 170 °C (338 °F; 443 K)
decomposes
0.14 mg/L (19.96 °C)
0.25 mg/L (21 °C)
6.68 mg/L (100 °C)
1.03·10−12
Solubility Insoluble in acids (reacts) except when concentrated, acetates, aq. nitrates
Solubility in silver nitrate 43.2 mg/L (25.2 °C, 3 nAgNO3/H2O)
Solubility in sulfur dioxide 14 mg/kg (0 °C)
Solubility in methanol 0.0022 mg/kg
−6.18·10−5 cm3/mol
Structure
Monoclinic, mS32 (293 K)
C2/c, No. 15 (293 K)
2/m (293 K)
a = 8.792(5) Å, b = 7.998(5) Å, c = 8.207(5) Å (293 K)
α = 90°, β = 93.75(1)°, γ = 90°
8
Thermochemistry
63 J/mol·K
131 J/mol·K
88 kJ/mol
Hazards
GHS labelling:
Warning
H302, H312, H332, H410
P273, P280, P501
NFPA 704 (fire diamond)
2
0
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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