Magnesium stearate
Brief Introduction:
Magnesium stearate, with a chemical formula of C36H70MgO4 and a molecular weight of 591.24, is an organic compound. It is a white, non-sandy fine powder that feels greasy when in contact with the skin. Insoluble in water, ethanol or ether, it is mainly used as lubricant, anti-sticking agent and glidant. It is especially suitable for the granulation of oils and extracts, and the granules produced have good fluidity and compressibility. Used as a glidant in direct compression. It can also be used as a filter aid, clarifying agent and dripping agent, as well as a suspending agent and thickening agent for liquid preparations.
Specifications of our Magnesium Stearate USP43-NF38:
| Test Items | Specifications |
| Characteristics | This product is a white, light and non-sandy fine powder with a slight peculiar smell; it is insoluble in water, ethanol or ether. |
| Identification 1: Identification of Fatty Acids | The retention time of the two main peaks of the test solution should be consistent with the retention time of the two main peaks of the reference solution. |
| Identification 2: Magnesium Salt Identification Reaction | Should be positive |
| Acidity or alkalinity | Meets the requirements |
| Loss on Drying | Not more than 6.0% |
| Chloride | Not more than 0.1% |
| Sulphates | Not more than 1.0% |
| Lead(Pb) | Not more than 10 ppm |
| Cadmium(Cd) | Not more than 1 ppm |
| Nickel(Ni) | Not more than 5 ppm |
| Stearic Acid | Not less than 40.0% |
| Stearic Acid & Palmitic Acid | Not less than 90.0% |
| Assay(Magnesium) | 4.0% ~ 5.0% |
| Total Plate Count | Not more than 1000 CFU/g |
| Moulds & yeasts | Not more than 500 CFU/g |
| Escherichia coli | Negative |
| Salmonella | Negative |
| Specific surface area | / |
Application Field:
1. Magnesium stearate is used as a heat stabilizer for polyvinyl chloride, as well as cosmetic flour, emollient ointment and pharmaceutical tablet raw materials (excipients, lubricants); it is used in school wood powder to make it lubricated, bright and transparent; Used as a transparent flatting agent in the paint industry.
2. Widely used in food, medicine, paint, plastic, rubber, textile, etc.
3. Magnesium stearate is a new type of pharmaceutical excipient, which can be used as a film-forming coating material for solid preparations, a thickener and suspending agent for colloidal liquid preparations, etc.
4. Used in powder products in cosmetics to improve adhesion and lubricity.
Packaging:
Woven bag for external use, lined with high-pressure polyethylene film bag, net weight 20kg; can also be packed according to the specific requirements from customers.
Storage Conditions:
Preserved in unopened original containers in a cool dry and ventilated place before using; kept away from direct sunlight, heat and moisture.
Shelf Life:
24 months if stored under above conditions.
