Lead stearate

Chemical compound From Wikipedia, the free encyclopedia

Lead stearate is a metal-organic compound, a salt of lead and stearic acid with the chemical formula C
36H
70PbO
4.[1] The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.[2] The compound is toxic.

Quick facts Names, Identifiers ...
Lead stearate
Names
Other names
Lead(2+) octadecanoate, lead(II) stearate, lead distearate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.012.733 Edit this at Wikidata
EC Number
  • 214-005-2
UNII
  • InChI=1S/2C18H36O2.Pb/c2*1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2*2-17H2,1H3,(H,19,20);/q;;+2/p-2
    Key: UQLDLKMNUJERMK-UHFFFAOYSA-L
  • CCCCCCCCCCCCCCCCCC(=O)[O-].CCCCCCCCCCCCCCCCCC(=O)[O-].[Pb+2]
Properties
C
36H
70PbO
4
Molar mass 774.14
Appearance White powder
Density 1.4 g/cm3
Melting point 115.7 °C (240.3 °F; 388.8 K)
Boiling point 359.4 °C (678.9 °F; 632.5 K)
Slightly soluble
Hazards
GHS labelling:
GHS07: Exclamation markGHS08: Health hazardGHS09: Environmental hazard
Danger
H302, H332, H360, H373
P260, P281, P304, P340, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Synthesis

The compound can be prepared by reacting stearic acid, lead(II) oxide, and a catalyst acetic acid.[3]

Also, an exchange reaction between lead(II) acetate and sodium stearate:

Physical properties

White powder with a slight fatty odor. Sinks in water.[4] Hygroscopic in air.

Slightly soluble in water.[1] Soluble in hot ethanol.

Uses

The compound is used as a drier in oil paints and varnishes to speed the polymerization and oxidation processes. Also used as a lubricant and stabilizer in vinyl polymers and as a corrosion inhibitor in petroleum products.[5][6][7]

References

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