Magnesium Stearate

Functions
Lubricator
Emulsion stabilizer
Thickener
Anticaking
Bulking
Colorant
Moisturizer
CAS Number(s)
557-04-0
EINECS number(s)
209-150-3
FDA UNII
70097M6I30

Also known as magnesium salt, this substance is found in many medicines taken today in pill form. It is regarded as safe by the Food and Drug Administration.

The molecular formula for magnesium stearate consists of a single magnesium atom joined to two stearate molecules, which contain complex quantities of carbon, hydrogen, and oxygen. It turns solid at room temperature, typically appears as a white powder, and is not soluble in water.

The primary use for magnesium stearate today is in tablets and capsules produced by the medical industry. It is a lubricant that prevents other ingredients in the tablets from adhering to compression equipment during the manufacturing process. Additionally, companies use it to bind sugars in certain candies.

Magnesium salt is also produced by the combination of hard water and soap. It and calcium stearate are responsible for the appearance of most bathtub rings. In personal care applications, Magnesium stearate is used for its thickening, emulsion stabilizing, film forming, and sensory enhancing properties. It is also widely used in decorative cosmetics.
Synonyms
Magnesium distearate
Magnesium Stearate
Magnesii Stearas