Lead stearate
CAS 1072-35-1
EC 214-005-2
Formula C18H36O2.1/2Pb
MW 774.14 g/mol
Salts & Minerals Plastics & PolymersRubber & TireLubricants & Metalworking LubricationPlasticizer & SoftenerAntioxidant & Stabilizer
Description
Lead stearate (CAS 1072-35-1) is an organic lead salt derived from stearic acid, commercially available under trade names including P-289, Stabinex NC18, Haro Chem P28G, and Lead Distearate. It carries no assigned E-code and is classified under salts and minerals.
In PVC and polymer processing, lead stearate functions as a heat stabilizer by neutralizing hydrogen chloride released during thermal degradation, preventing discoloration and chain breakdown. It also serves as an internal and external lubricant in rigid PVC compounds, reducing friction between polymer chains and at metal processing surfaces. In rubber formulations, it acts as a processing aid and antioxidant stabilizer.
Lead stearate is supplied as a white powder and is subject to REACH regulation (EC 1907/2006) due to its lead content, requiring strict handling and documentation protocols. Procurement teams should verify supplier Safety Data Sheets and confirm compliance with applicable substance restriction frameworks before sourcing.
In PVC and polymer processing, lead stearate functions as a heat stabilizer by neutralizing hydrogen chloride released during thermal degradation, preventing discoloration and chain breakdown. It also serves as an internal and external lubricant in rigid PVC compounds, reducing friction between polymer chains and at metal processing surfaces. In rubber formulations, it acts as a processing aid and antioxidant stabilizer.
Lead stearate is supplied as a white powder and is subject to REACH regulation (EC 1907/2006) due to its lead content, requiring strict handling and documentation protocols. Procurement teams should verify supplier Safety Data Sheets and confirm compliance with applicable substance restriction frameworks before sourcing.
Physical Properties
| Melting Point | 125 °C |
| Density | 1.323 |
| Appearance | Lead stearate is an organic lead compound. It is a white powder with a slight fatty odor. |
| Color | white |
| Form | powder |
| Water Solubility | Soluble in hot alcohol. Slightly soluble in warm water. |
Safety & Handling (Learn More)
Danger GHS07 GHS08 GHS09
H
H302H332H341H350H351H360H370H372H373H400H410
P
P203P260P261P264P270P271P273P280P317P318P319P321P330P391P405P501P301+P317P304+P340P308+P316
Other Names
P-289Stabinex NC18Haro chem P28GLead distearateLEAD(+2)STEARATELead(II) stearateLead(2+) stearate
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