INCI name

MAGNESIUM OXIDE

Magnesium oxide

A white inorganic powder.

What it is

Magnesium oxide is an inorganic compound of magnesium and oxygen, a white powder (also known as CI 77711). CosIng lists it as absorbent, buffering and opacifying.

Where it is used

Found in powders, makeup, masks and some deodorants and oral care products.

Limits of interpretation

The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.

Functions

Absorbent
Taking up water- and/or oil-soluble (dissolved or finely dispersed) substances.
Buffering
Stabilising the pH of an aqueous medium in a narrow range even if an acid or base is added. Altering and/or maintaining a cosmetic product's pH at the desired level.
Opacifying
Reducing transparency or translucency of cosmetics.

EU regulation

This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.

Products with this ingredient (49)

Check a full ingredient list