The material selection platform
Cosmetics Ingredients
The material selection platform
Cosmetics Ingredients


CAS Number 557-04-0
Chem/IUPAC Name: Magnesium distearate
EINECS/ELINCS No: 209-150-3
COSING REF No: 35120
Magnesium Stearate is a fine white powder that adds bulk to cosmetic and personal care products, while also providing them with a rich slippery feeling and adhesion. This ingredient makes products feel good to the touch and enhances the spreadability. Magnesium Stearate can also act as a lubricant and an anti-caking agent. It is generally found in products like creams, lotions, and powders where it improves the overall performance and shelf life of the formulation. Magnesium Stearate is soluble in hot water and has the formula Mg(C18H35O2)2.

What is MAGNESIUM STEARATE used for?

Magnesium Stearate has various uses in both cosmetics and skincare products. Primarily, it enhances the texture and performance of formulations within the cosmetic industry.
  • Cosmetic products: It is a good anti-caking agent that works wonders with cosmetic products. It promotes a slippery texture that enhances the blend and spreadability of products like blushes, eyeshadows, and foundations. Magnesium Stearate also aids with adherence to allow for long-lasting wear
  • Skin care: It is often utilized as a thickening agent and emulsifier. It helps to stabilize and bind the ingredients in creams, lotions, and moisturizers, ensuring a consistent and smooth texture. Magnesium Stearate also aids in the absorption of oils and active ingredients, facilitating their delivery into the skin for improved efficacy


Magnesium Stearate is generally produced by the reaction between magnesium salts and stearic acid. Stearic acid is neutralized with magnesium hydroxide or magnesium carbonate, resulting in the formation of magnesium stearate. The compound is then purified, dried, and milled into a fine powder for use in cosmetics and other applications.

What does MAGNESIUM STEARATE do in a formulation?

  • Anticaking
  • Bulking
  • Moisturising

Safety profile

Magnesium Stearate is generally safe for use and has no reported side effects. It also does not clog pores or cause breakouts. Patch testing of the product with Magnesium Stearate can be done for sensitive skin, but is not typically required. Depending on the source and manufacturing of this compound, it can be vegan and halal.


Technical profile

Property Values
Boiling Point 359.4°C
Melting Point 88.5°C
pH Neutral
Solubility Practically insoluble in water
Back to Top