A metallic-soap lubricant and release agent that pulls double duty as a PVC stabilizer component. It is a release agent and lubricant in the rubber and plastics industries and a stabilizer component in PVC systems.
▸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.
Physical Properties
Physical Description
Zinc stearate is a white, hydrophobic powder with a slight, characteristic odor. Mp: 130 °C. Density: 1.1 g cm-3. Insoluble in water, ethyl alcohol and diethyl ether. Soluble in acids. Non-toxic. In technical grades, the percentage of zinc may vary according to the intended use. Products with < the theoretical amount of zinc are more acidic
Appearance
White powder free from gritiness
Odor
Slight, characteristic odor
Melting Point
130 °C
Flash Point
277 °C
Solubility
Soluble in benzene; insoluble in water, alcohol and ether
Density
1.1
Vapor Pressure
0 mmHg (approx)
LogP
1.2
Autoignition Temperature
420 °C (420 °C)
pH
Neutral to moistened litmus paper
Safety & Handling
Full SDS available on request
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.
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.
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.
Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.
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