Lead(II) thiocyanate
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Lead(II) thiocyanate is a compound, more precisely a salt, with the formula Pb(SCN)2. It is a white crystalline solid, but will turn yellow upon exposure to light. It is slightly soluble in water and can be converted to a basic salt (Pb(CNS)2·Pb(OH)2 when boiled. Salt crystals may form upon cooling.[1] Lead thiocyanate can cause lead poisoning if ingested and can adversely react with many substances. It has use in small explosives, matches, and dyeing.
Names | |
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IUPAC name
Lead(II) thiocyanate | |
Systematic IUPAC name
Lead(II) thiocyanate | |
Other names
Lead dithiocyanate, lead isothiocyanate, lead sulfocyanate, lead thiocyanate, lead thiocyanate (Pb(SCN) 2), lead(II) thiocyanate, lead(II) thiocyanate (Pb(NCS) 2), thiocyanic acid, lead(2+) salt | |
Identifiers | |
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3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.008.887 |
EC Number |
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PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
Pb(SCN)2 | |
Molar mass | 323.3648 g/mol |
Appearance | white or light yellow powder |
Odor | odorless |
Density | 3.82 g/cm3 |
Melting point | 190 °C (374 °F; 463 K) |
0.553 g/100 mL | |
Solubility | soluble in nitric acid |
−82.0·10−6 cm3/mol | |
Hazards | |
GHS labelling: | |
Danger | |
H302, H312, H332, H360, H373, H410 | |
P201, P202, P260, P261, P264, P270, P271, P273, P280, P281, P301+P312, P302+P352, P304+P312, P304+P340, P308+P313, P312, P314, P322, P330, P363, P391, P405, P501 | |
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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Lead(II) thiocyanate is reasonably soluble at room temperature, thus it may be difficult to identify in a solution with low concentration of lead(II) thiocyanate. Although it has not been confirmed by other sources than the author of this[which?] article, experiments show that even if there is no precipitation of lead(II) thiocyanate in the solution, crystals of the salt may form.