| Typical physical and chemical properties | |
|---|---|
| Catalog Number | ACM557051 |
| Product Name | Zinc Stearate |
| CAS | 557-05-1 |
| Structure |  |
| Synonyms | Stearic acid, zinc salt |
| Description | Zinc stearate is a “zinc soap” that is widely used industrially. In this context, soap is used in its formal sense, a metal “salt” of a fatty acid. It is a White solid that repels water. It is insoluble in polar solvents such as alcohol and ether but soluble in aromatic hydrocarbons (e.g., benzene) and chlorinated hydrocarbons when heated. It is the most powerful mold release agent among all metal soaps. It contains no electrolyte and has a hydrophobic effect. Its main application areas are the plastics and rubber industry, where it is used as a releasing agent and lubricant which can be easily incorporated.Zinc carboxylates, e.g. basic zinc acetate, adopt complex formulas, and are not simply dicarboxylates of zinc. Instead the formula for most zinc carboxylates is Zn4O(O2CR)6, consisting of a Zn4O6+ core with carboxylate ligands spanning the edges. |
| IUPAC Name | Zinc;octadecanoate |
| Molecular Weight | 632.35 |
| Molecular Formula | C36H70ZnO4 |
| Canonical SMILES | CCCCCCCCCCCCCCCCCC(=O)[O-].CCCCCCCCCCCCCCCCCC(=O)[O-].[Zn+2] |
| InChI | XOOUIPVCVHRTMJ-UHFFFAOYSA-L |
| InChIKey | InChI=1S/2C18H36O2.Zn/c2*1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2*2-17H2,1H3,(H,19,20);/q;;+2/p-2 |
| Melting Point | 128-130 °C(lit.) |
| Flash Point | 180 °C |
| Density | 1.095g/ml |
| Solubility | Insoluble (NIOSH, 2016);Soluble in benzene; insoluble in water, alcohol and ether;Soluble in acids and common solvents when hot;Solubility in water: none;Insoluble; |
| Appearance | White powder with fatty acid odour |
| Application | It is widely used as a release agent for the production of many kinds of objects rubber, poly urethane, poly ester processing system, powder metallurgy. These applications exploit its "non-stick" properties . In cosmetics, zinc stearate is a lubricant and thickening to improve texture. It is an "activator" for rubber vulcanization by sulfur and accelerators. As discovered in the early days of vulcanization, zinc has a beneficial effect on the reaction of the sulfur with the polyolefin. The stearate is a form of zinc that is highly soluble in the nonpolar medium of the poly olefins. Being lipophilic, it functions as a phase transfer catalyst for the saponification of fats.zinc stearate is used in cosmetic formulations to increase adhesive properties. It is also used as a coloring agent. This is a mixture of the zinc salts of stearic and palmitic acids.Zinc stearate is primarily used in pharmaceutical formulations as a lubricant in tablet and capsule manufacture at concentrations up to 1.5% w/w. It has also been used as a thickening and opacifying agent in cosmetic and pharmaceutical creams, and as a dusting powder. |
| Storage | Zinc stearate is stable and should be stored in a well-closed container in a cool, dry place. |
| Complexity | 196 |
| Covalently-Bonded Unit Count | 3 |
| Decomposition | Zinc stearate decomposes on burning producing irritating and toxic fumes including zinc oxide.; |
| Exact Mass | 630.457g/mol |
| Heavy Atom Count | 41 |
| Monoisotopic Mass | 630.457g/mol |
| pH | Neutral to moistened litmus paper; |
| Physical State | Solid |
| Rotatable Bond Count | 30 |
| Topological Polar Surface Area | 80.3A^2 |
| Vapor Pressure | 0 mm Hg (approx) (NIOSH, 2016);0 mmHg (approx);0 mmHg (approx); |
| MSDS | Download MSDS |
| COA | Download COA |
| Spec Sheet | Download Spec Sheet |
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