Lead stearate

Last updated
Lead stearate
Lead(II) stearate.svg
Names
Other names
Lead(2+) octadecanoate, lead(II) stearate, lead distearate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.012.733 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 214-005-2
PubChem CID
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
AppearanceWhite 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:
GHS-pictogram-exclam.svg GHS-pictogram-silhouette.svg GHS-pictogram-pollu.svg
Danger
H302, H332, H360, H373
P260, P261, 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).

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.

Contents

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]

Related Research Articles

<span class="mw-page-title-main">Triglyceride</span> Any ester of glycerol having all three hydroxyl groups esterified with fatty acids

A triglyceride is an ester derived from glycerol and three fatty acids. Triglycerides are the main constituents of body fat in humans and other vertebrates, as well as vegetable fat. They are also present in the blood to enable the bidirectional transference of adipose fat and blood glucose from the liver, and are a major component of human skin oils.

<span class="mw-page-title-main">Stearic acid</span> Eighteen-carbon straight-chain fatty acid

Stearic acid is a saturated fatty acid with an 18-carbon chain. The IUPAC name is octadecanoic acid. It is a soft waxy solid with the formula CH3(CH2)16CO2H. The triglyceride derived from three molecules of stearic acid is called stearin. Stearic acid is a prevalent fatty-acid in nature, found in many animal and vegetable fats, but is usually higher in animal fat than vegetable fat. It has a melting point of 69.4 °C and a pKa of 4.50.

<span class="mw-page-title-main">Lead(IV) acetate</span> Organometallic compound (Pb(C2H3O2)4)

Lead(IV) acetate or lead tetraacetate is an metalorganic compound with chemical formula Pb(C2H3O2)4. It is a colorless solid that is soluble in nonpolar, organic solvents, indicating that it is not a salt. It is degraded by moisture and is typically stored with additional acetic acid. The compound is used in organic synthesis.

Polymer stabilizers are chemical additives which may be added to polymeric materials, such as plastics and rubbers, to inhibit or retard their degradation. Common polymer degradation processes include oxidation, UV-damage, thermal degradation, ozonolysis, combinations thereof such as photo-oxidation, as well as reactions with catalyst residues, dyes, or impurities. All of these degrade the polymer at a chemical level, via chain scission, uncontrolled recombination and cross-linking, which adversely affects many key properties such as strength, malleability, appearance and colour.

Cadmium stearate is a salt with the formula Cd(O2CC17H35)2. Classified as a metallic soap, this a white solid is used as a lubricant and as a heat- and light-stabilizer in polyvinyl chloride. The use of cadmium stearate is being phased out because of its toxicity.

<span class="mw-page-title-main">Lead compounds</span> Type of compound

Compounds of lead exist with lead in two main oxidation states: +2 and +4. The former is more common. Inorganic lead(IV) compounds are typically strong oxidants or exist only in highly acidic solutions.

Silver stearate is a metal-organic compound with the chemical formula C
18H
36AgO
2. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

Tin(II) stearate is a metal-organic compound with the chemical formula C
18H
36SnO
2. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

<span class="mw-page-title-main">Copper(II) stearate</span> Chemical compound

Copper(II) stearate is a metal-organic compound, a salt of copper and stearic acid with the formula Cu(C17H35COO)2. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

Mercury(II) stearate is a metal-organic compound, a salt of mercury and stearic acid with the chemical formula C
36H
70HgO
4. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid. The compound is highly toxic by inhalation, ingestion, and skin absorption.

<span class="mw-page-title-main">Cobalt(II) stearate</span> Chemical compound

Cobalt(II) stearate is a metal-organic compound, a salt of cobalt and stearic acid with the chemical formula C
36H
70CoO
4. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

Nickel(II) stearate is a metal-organic compound, a salt of nickel and stearic acid with the chemical formula C
36H
70NiO
4. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid. The compound is harmful if swallowed and may cause skin sensitization.

Strontium stearate is a metal-organic compound, a salt of strontium and stearic acid with the chemical formula C
36H
70SrO
4. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

Zirconium stearate is a metal-organic compound, a salt of zirconium and stearic acid with the chemical formula C
72H
140ZrO
8.

Lanthanum stearate is a metal-organic compound, a salt of lanthanum and stearic acid with the chemical formula C
54H
108LaO
6. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

Cerium stearate is a metal-organic compound, a salt of cerium and stearic acid with the chemical formula C
54H
105CeO
6. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

Manganese stearate is a metal-organic compound, a salt of manganese and stearic acid with the chemical formula C
36H
70MnO
4. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

Potassium stearate is a metal-organic compound, a salt of potassium and stearic acid with the chemical formula C
18H
35KO
2. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

Caesium stearate is a metal-organic compound, a salt of caesium and stearic acid with the chemical formula C
18H
35CsO
2. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

Iron(III) stearate is a metal-organic compound, a salt of iron and stearic acid with the chemical formula C
54H
105FeO
6.

References

  1. 1 2 "Lead Stearate". American Elements . Retrieved 7 March 2023.
  2. ↑ "T3DB: Lead stearate". t3db.ca. Retrieved 7 March 2023.
  3. ↑ "Preparation process of lead stearate based on melting method". 18 December 2013. Retrieved 7 March 2023.
  4. ↑ "LEAD STEARATE | CAMEO Chemicals | NOAA". cameochemicals.noaa.gov. Retrieved 7 March 2023.
  5. ↑ "Lead Stearate » Waldies Co. Ltd". Waldies Co. Ltd. Retrieved 7 March 2023.
  6. ↑ Encyclopedia of Chemical Technology: Fuel resources to heat stabilizers. Wiley. 1991. p. 1074. ISBN   978-0-471-52669-8 . Retrieved 7 March 2023.
  7. ↑ Titow, M. V. (6 December 2012). PVC Technology. Springer Science & Business Media. p. 269. ISBN   978-94-009-5614-8 . Retrieved 7 March 2023.
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