Zinc stearate
CAS 557-05-1
EC 209-151-9
Formula C18H36O2.1/2Zn
MW 632.33 g/mol
Oils, Fats & Waxes Personal Care & CosmeticsLubricants & MetalworkingPlastics & PolymersBuilding & ConstructionTextile, Leather & PaperRubber & Tire Antioxidant & StabilizerEmulsification & DispersionLubricationSurface Modification & Wetting
Description
Zinc stearate (CAS 557-05-1) is a zinc soap derived from stearic acid, supplied as a white powder under trade names including Metallac, Dermarone, Aqua Zinc, and Antidust 2. It carries no assigned E-code and is classified under HS code 29157020. The molecular formula is C18H36O2·1/2Zn.
In plastics processing, zinc stearate functions as a heat stabilizer and internal lubricant, reducing friction between polymer chains and metal surfaces during extrusion. In rubber compounding, it acts as a mold release agent by forming a low-adhesion boundary layer at the mold interface. Personal care formulators use it as an emulsifier and slip agent in pressed powders and creams.
Zinc stearate is available in standard powder grade and is subject to REACH registration requirements for EU supply. Procurement teams should confirm technical or cosmetic-grade specifications depending on end application. Packaging is typically supplied in 25 kg bags or bulk containers.
In plastics processing, zinc stearate functions as a heat stabilizer and internal lubricant, reducing friction between polymer chains and metal surfaces during extrusion. In rubber compounding, it acts as a mold release agent by forming a low-adhesion boundary layer at the mold interface. Personal care formulators use it as an emulsifier and slip agent in pressed powders and creams.
Zinc stearate is available in standard powder grade and is subject to REACH registration requirements for EU supply. Procurement teams should confirm technical or cosmetic-grade specifications depending on end application. Packaging is typically supplied in 25 kg bags or bulk containers.
Physical Properties
| Melting Point | 130 °C |
| Boiling Point | 240°C[at 101 325 Pa] |
| Density | 1.095 g/cm³ |
| Flash Point | 180°C |
| Appearance | white powder with fatty acid odour |
| Color | White |
| Odor | wh. powd., faint char. odor |
| Form | Powder |
| Water Solubility | Insoluble |
| Vapor Pressure | 0Pa at 25℃ |
| Log P | 4.64 at 25℃ |
Safety & Handling (Learn More)
Warning GHS07 GHS09
H
H316H320H335H400H413
P
P261P271P273P319P391P405P501P264+P265P304+P340P332+P317P337+P317P403+P233P305+P351+P338
Trade & Regulatory
| HS Code | 29157020 |
| Storage Class | 11 - Combustible Solids |
Other Names
Dibasic zinc stearateMetallacAQUA ZINCDermaroneai3-00388Talculin Z
Related Products
Raw Materials
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