Lead distearate

Structural formula
General
Surname	Lead distearate
other names	Lead stearate Lead (II) stearate Lead (II) octadecanoate
Molecular formula	C 36 H 70 O 4 Pb
Brief description	colorless solid
External identifiers / databases
CAS number 1072-35-1 EC number 214-005-2 ECHA InfoCard 100.012.733 PubChem 61258 ChemSpider 55198 Wikidata Q883610
properties
Molar mass	774.15 g mol −1
Physical state	firmly
Melting point	125 ° C
solubility	almost insoluble in water
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary danger H and P phrases H: 360Df-332-302-373-410 P: ?
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Lead distearate is the lead salt of stearic acid (therefore also called lead soap ).

Extraction and presentation

Lead stearate can be obtained by precipitation from aqueous sodium stearate solution with lead salts such as lead (II) chloride or by heating stearic acid with lead compounds such as lead (II) oxide .

${\displaystyle \mathrm {2\ C_{17}H_{35}COONa+PbCl_{2}\longrightarrow (C_{17}H_{35}COO)_{2}Pb+\ NaCl} }$

${\displaystyle \mathrm {2\ C_{17}H_{35}COOH+PbO\longrightarrow (C_{17}H_{35}COO)_{2}Pb+\ H_{2}O} }$

properties

Lead distearate is a colorless powder that is practically insoluble in water.

use

Lead distearate is used as a stabilizer in PVC , as a lubricant additive, and as an X-ray detector material.

Related links

• Stearic acid, lead salt
• Stearic acid, lead salt (1 :?) C ₁₈ H ₃₆ O ₂ Pb _x
• Dioxobis (stearato) diblei
• dibasic lead stearate (C ₃₇ H ₃₅ COO) ₂ Pb · 2 PbO

Individual evidence

1. ↑ ^{a b c d e} Entry on lead stearate in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
2. ↑ Entry on Lead distearate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on December 21, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .
3. ↑ Patent DE860210 : Process for the production of metal salts of fatty acids with more than 6 carbon atoms. Applied on March 13, 1952 , published October 30, 1952 , applicant: Titan Company, inventor: Leonard Martin Kebrich, Adrian Richard Pitrot. ‌
4. ↑ Patent DE860208 : Process for the production of carboxylic acid salts of polyvalent metals in pearl, lens or core shape. Registered on April 3, 1952 , published on October 30, 1952 , applicant: Rhein-Chemie, inventor: Rudolf Kern. ‌
5. ↑ Hans K. Felger: polyvinyl chloride . Hanser Verlag, 1986, ISBN 3-446-14360-2 , p. 1461 ( limited preview in Google Book Search).
6. ↑ External identifiers or database links for Stearic acid, lead salt : CAS number: 52652-59-2, Wikidata : Q89778348 .
7. ↑ External identifiers or database links for stearic acid, lead salt : CAS number: 7428-48-0, EC number: 231-068-1, ECHA InfoCard: 100.028.244 , Wikidata : Q89821422 .
8. ↑ External identifiers of or database links to Dioxobis (stearato) dilead : CAS number: 56189-09-4, EC number: 260-043-8, ECHA InfoCard: 100.054.567 , PubChem : 5362548 , Wikidata : Q72463434 .
9. ↑ External identifiers of or database links to Dioxobis (stearato) trilead : CAS number: 12578-12-0, EC number: 235-702-8, ECHA InfoCard: 100.032.444 , Wikidata : Q27896684 .