ZINC STEARATE- ▸ Release agent: Mold-release agent and lubricant in rubber and plastics.
- ▸ PVC stabilizer: Stabilizer component in PVC systems.
- ▸ Dusting agent: Anti-tack dusting agent for rubber.
- ▸ Sanding additive: Sanding and flatting agent in paints, lacquers, and varnishes.
- ▸ Water-repellent: Waterproofing agent.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Zinc stearate (CAS 557-05-1) is the zinc salt of stearic acid, used as a lubricant, release agent, and heat and light stabilizer. It is a release agent and lubricant in the rubber and plastics industries and a stabilizer component in PVC systems. It is also used as a dusting agent and water-repellent.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 209-151-9
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Solutions Using This Product
Process-solution guides on this site that specify this chemistry:
- Acid Scavengers for Polyolefins (Hydrotalcite) (Plastics & Polymers)
- Mold Release Agents for Injection & Compression Molding (Plastics & Polymers)
- Pigment Dispersants & Processing Aids for Masterbatch (Plastics & Polymers)
Frequently Asked Questions
What is zinc stearate used for?
Zinc stearate (CAS 557-05-1), the zinc salt of stearic acid, is used as a mold-release agent and lubricant in rubber and plastics, a stabilizer component in PVC systems, an anti-tack dusting agent, a sanding/flatting additive in paints and lacquers, and a water-repellent.
Is zinc stearate the same as zinc oxide?
No. Zinc stearate is the organic zinc salt of stearic acid (C36H70O4Zn), used as a lubricant and release agent. Zinc oxide is inorganic ZnO, used mainly as a rubber vulcanization activator and pigment. They are different compounds with different roles.
Is zinc stearate water soluble?
No. Zinc stearate is insoluble in water and in most polar solvents; it is soluble in hot aromatic and chlorinated solvents. Its hydrophobic nature underlies its use as a water-repellent and release agent.
What is the HS code for zinc stearate?
Zinc stearate classifies under HS 2915.70. Confirm the final tariff classification with your customs broker for the specific format and destination.
What is the cost of bulk zinc stearate?
Pricing depends on grade, particle size, and order volume, so RawSource does not publish a fixed list price. CoA and SDS are available; request a current bulk quote for bag, drum, or tote quantities.
What is the REACH and TSCA regulatory status of Zinc Stearate?
Zinc Stearate (CAS 557-05-1) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 209-151-9).