Lead(II) thiocyanate
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. 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 | |
|---|---|
| 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 | |
3D model (JSmol) |
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| ChemSpider | |
| 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).
Infobox references | |
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 article, experiments show that even if there is no precipitation of lead(II) thiocyanate in the solution, crystals of the salt may form.