Lead(II) thiocyanate

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Lead(II) thiocyanate
Identifiers
CAS number 592-87-0
PubChem 11616
Properties
Molecular formula 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)
Solubility in water 0.553 g/100 mL
Solubility soluble in nitric acid
Hazards
R-phrases R61 R20/21/22 R32 R33 R50/53 R62
S-phrases S53 S13 S45 S60 S61
NFPA 704
Flammability code 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g., canola oil Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g., calcium Special hazards (white): no codeNFPA 704 four-colored diamond
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Lead(II) thiocyanate is a chemical compound, more precisely a salt, with the chemical formula Pb(SCN)2.

Lead(II) thiocyanate may be made by reacting lead(II) acetate (Pb(CH3COO)2) solved in water with either potassium thiocyanate (KSCN) or ammonium thiocyanate (NH4SCN), thus causing precipitation of solid lead(II) thiocyanate.

Ion reaction:

Pb2+(aq) + 2SCN-(aq) → Pb(SCN)2(s)

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.

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