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Tablet Excipients Lubricant Magnesium Stearate

Product Name: Magnesium Stearate
CAS No.: 557-04-0
EINECS No.: 209-150-3
Molecular Formula: C36H70MgO4,2(C18H35O2).Mg
Molecular Weight: 591.24
Melting point: 200 °C(lit.)
Appearance: White fine powder
Grade:Pharmaceutical Grade
Application: Stabilizing agent,lubricant


Magnesium stearate 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. Its applications exploit its softness, insolubility in many solvents, and low toxicity. It is used as a release agent and as a component or lubricant in the production of pharmaceuticals and cosmetics.

Magnesium Stearate is a popular lubricant because it also acts as a glidant and anti-adherent.Magnesium stearate is often used as an anti-adherent in the manufacture of medical tablets, capsules and powders.In this regard, the substance is also useful, because it has lubricating properties, preventing ingredients from sticking to manufacturing equipment during the compression of chemical powders into solid tablets; magnesium stearate is the most commonly used lubricant for tablets.Magnesium stearate can also be used efficiently in dry coating processes.


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