Zinc Stearate

Zinc Stearate

Zinc Stearate is an oleochemical substance featuring a white, powdery appearance. Also known as zinc soap, Zinc Stearate has the ability to repel water and is insoluble in certain types of polar solvents. Zinc Stearate is formed by combining stearic acid with zinc oxide, the latter of which is an organic white-powder compound that is insoluble in water. While it does not produce a strong odor, Zinc Stearate powder does have a slight fatty acid scent.

There are a number of methods employed to manufacture Zinc Stearate. In addition to the direct method of combining stearic acid with zinc oxide, there is also an indirect method known as precipitation, which entails the formation of a solid from a liquid solution. The fusion method involves a high-shear process using tightly controlled pressure and temperature conditions.

Zinc Stearate offers a number of chemical properties that are invaluable from a manufacturing perspective. These include lubricity, compatibility and hydrophobicity (not attracted to water). It also features a “sharp” melting point, meaning it liquefies upon melting. The latter characteristic differentiates Zinc Stearate from other metallic stearate materials.

Zinc Stearate can be either veg or tallow-based — veg-based materials come from vegetable sources, while tallow-based materials are extracted from animal sources. Like all Metallic Stearates, Zinc Stearate has many industrial applications. The USP grade can be used in pharmaceutical, nutraceutical and cosmetic applications when used according to CFR 21 and FDA guidelines.

Acme-Hardesty offers Zinc Stearate in various grades and forms for a wide range of industrial applications. As one of the leading distributors of oleochemicals in the U.S. with more than 70 years of experience, you can count on us for superior Zinc Stearate products at competitive prices. Read below for more information on Zinc Stearate and its uses, or give us a call today!