Zinc Stearate IP
Abstract:
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.
Use/Application:
It is the most powerful mold release agent among all metal soaps. It is widely used as a release agent for the production of many kinds of objects: rubber, polyurethane, polyester processing system, powder metallurgy. These applications exploit its “non-stick” properties. In cosmetics, zinc stearate is a lubricant and thickening agent used to improve texture. Being lipophilic, it functions as a phase transfer catalyst for the saponification of fats
Identity:
Mol. Formula: (C17H35CO2)2Zn
Mol. Wt.: 632.3 g/mol
CAS No.: 557-05-1
Other names: Zinc distearate
General Specifications
| Test | Specification |
| Characters | A fine, white, bulky, amorphous powder, free from grittiness; odor, faint and characteristic. |
| Identification
Test (A)
Test (B) |
(a)Specified Test. The freezing point of the residue is not lower than 53º (b) Neutralize 5ml of solution A to red litmus paper with 10M sodium hydroxide. The solution gives the reactions of zinc salts |
| Solubility | Practically insoluble in water and in ethanol |
| Appearance of solution | The solution is not more colored than the reference solution |
| Acidity or alkalinity | Not more than 0.3 ml of 0.1 M hydrochloric acid or 0.1ml of 0.1M sodium hydroxide is required to change the color of the solution. |
| Alkalis and alkaline earths | The residue weights not more than 20mg |
| Arsenic | Maximum 2ppm |
| Heavy metals | Maximum 20ppm |
| Chlorides | Maximum 250ppm |
| Sulphates | Maximum 0.6% |
| Assay | Not less than 10% and not more than 12% of Zn |
Shelf life, Storage and Packing
It should be stored in a segregated area in a cool and ventilated place away from combustible materials. Keep in a tightly closed container, sealed until ready for use. It is packed in 25kg or 50kg HDPE bags or drums as required.
Other
GLP, cGMP (FDA) Approved, ISO 9001, ISO 14001, ISO 45001, ISO 17025, ISO 22000, FSSC 22000, FSSAI, Halal and Kosher certified.
We observe WHO Good manufacturing practice and Good laboratory practice.
