Ammonium stearate

Ammonium stearate (CAS 1002-89-7), the ammonium salt of stearic acid, functions as an emulsifier, rheology modifier, and foam control agent across multiple industrial sectors. It enables stable dispersion of hydrophobic materials in aqueous systems, making it a practical processing aid where pH-sensitive formulations require controlled viscosity and surface activity.

In construction, it is used in waterproofing compounds and masonry treatments where controlled emulsion stability is critical to coating performance for long-term durability. Rubber and tire manufacturers incorporate it as a processing aid and dispersing agent during compounding, improving filler distribution and surface finish of the final product.

Personal care formulators use it to build viscosity and stabilize emulsions in creams and lotions without relying on synthetic thickeners, ensuring a smooth application profile. In textile and leather processing, it functions as a softening and finishing agent, improving surface feel and aiding uniform dye or coating penetration across the material.

Ammonium stearate is supplied as a paste or aqueous solution, with dry powder or flake forms available for specific applications depending on the manufacturing requirements. Standard concentrations in solution form typically range around 33–35% active content. Technical and industrial grades are the most common supply specifications for global distribution.