Lead(II) thiocyanate

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Lead(II) thiocyanate
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
592-87-0
PubChem 11616
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
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 otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
 YesY verify (what isYesY/N?)
Infobox references

Lead(II) thiocyanate is a compound, more precisely a salt, with the 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.

See also[edit]

External links[edit]