Zinc Stearate USP
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
Chemical Name: Zinc Stearate
CAS No.: 557-05-1
General Specifications:
| Test | Specification |
| Characters | It appears as a fine, white, bulky powder, free from grittiness with faint characteristic odor. |
| Identification
Test(A)
Test(B) |
(a) Specified test for Zinc. A portion of the water layer meets the requirements. (b) Specified Test for Congealing Temperature. The fatty acids congeal at a temperature not below 54°. |
| Solubility | Insoluble in water, alcohol and in ether |
| Arsenic | Not more than 1.5ppm |
| Lead | Not more than 10 ppm |
| Alkalies and alkaline earths | Not more than 1% |
| Residual solvents | Meets the requirements |
| Assay | Not less than 12.5% and not more than 14.0% of ZnO. |
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.
