Magnesium Stearate USP
Magnesium stearate is the chemical compound with the formula Mg(C18H35O2)2. It is a soap, consisting of salt containing two equivalents of stearate (the anion of stearic acid) and one magnesium cation (Mg2+). Magnesium stearate is a white, water-insoluble powder.
It is used as a release agent and as a component or lubricant in the production of pharmaceuticals and cosmetics. Magnesium stearate is often used as an anti-adherent in the manufacture of medical tablets, capsules and powders. In the creation of pressed candies, magnesium stearate acts as a release agent and it is used to bind sugar in hard candies such as mints.
Molecular Formula: Mg(C18H35O2)2.
Molecular Weight: 591.27 g/mol
CAS No.: 557-04-0
|Characters||It occurs as a very fine, light, white powder, slippery to touch|
(A)The solution responds to the test for magnesium
(B) Specified test
|Solubility||It is insoluble in water, in alcohol, and in ether.|
|Acidity or alkalinity||Specified Test|
|Loss on drying||Not more than 6.0%|
|Specific surface area||Specified Test|
|Chloride||Not more than 0.1%|
|Sulfate||Not more than 1.0%|
|Limit of Cadmium||Not more than 3 ppm|
|Limit of Lead||Not more than 10 ppm|
|Limit of Nickel||Not more than 5 ppm|
|Relative content of stearic acid and palmitic acid||Specified Test|
|Residual solvents||Meets the requirements|
|Assay||Not less than 4.0% and not more than 5.0% of on dried basis|
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.
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We observe WHO Good manufacturing practice and Good laboratory practice.