Lithium stearate

Lithium stearate (CAS 4485-12-5) is the lithium salt of stearic acid, produced by reacting stearic acid with lithium hydroxide. It is commercially available under trade names including Stavinor, Lithalure, Litholite, and S 7000. No E-code applies to this substance.

In lubricating greases, lithium stearate acts as a thickener by forming a fibrous soap matrix that immobilises base oil and provides mechanical stability across a broad temperature range. In plastics processing, it functions as an internal and external lubricant, reducing friction between polymer chains and metal surfaces during extrusion or moulding. Personal care formulators use it as a rheology modifier and emulsion stabiliser in stick and cream formats.

Lithium stearate is supplied as a white powder and is subject to REACH registration requirements within the EU. Buyers should confirm grade suitability against application-specific standards, as cosmetic and industrial grades differ in purity specifications. Standard packaging includes 25 kg bags and bulk options depending on supplier.