Silver thiocyanate
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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.[6] It is insoluble in ethanol, acetone, and acid.[7]
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
Silver(I) thiocyanate, Silver thiocyanate | |
Other names
Thiocyanic acid, silver (1+) thiocyanate; Silver isothiocyanate; Silver sulphocyanide[1] | |
Identifiers | |
3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.015.395 |
EC Number |
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PubChem CID |
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UNII | |
UN number | 3077 |
CompTox Dashboard (EPA) |
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Properties | |
AgSCN | |
Appearance | Colorless crystals |
Odor | Odorless |
Melting point | 170 °C (338 °F; 443 K) decomposes[2] |
0.14 mg/L (19.96 °C) 0.25 mg/L (21 °C) 6.68 mg/L (100 °C)[1] | |
Solubility product (Ksp) |
1.03·10−12[3] |
Solubility | Insoluble in acids (reacts)[4] except when concentrated, acetates, aq. nitrates[1] |
Solubility in silver nitrate | 43.2 mg/L (25.2 °C, 3 nAgNO3/H2O)[1] |
Solubility in sulfur dioxide | 14 mg/kg (0 °C)[2] |
Solubility in methanol | 0.0022 mg/kg[2] |
−6.18·10−5 cm3/mol[3] | |
Structure | |
Monoclinic, mS32 (293 K)[5] | |
C2/c, No. 15 (293 K)[5] | |
2/m (293 K)[5] | |
α = 90°, β = 93.75(1)°, γ = 90° | |
Formula units (Z) |
8 |
Thermochemistry | |
Heat capacity (C) |
63 J/mol·K[2] |
Std molar entropy (S⦵298) |
131 J/mol·K[2] |
Std enthalpy of formation (ΔfH⦵298) |
88 kJ/mol[2] |
Hazards | |
GHS labelling: | |
[4] | |
Warning | |
H302, H312, H332, H410[4] | |
P273, P280, P501[4] | |
NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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