Magnesium Oxide

Magnesium Oxide

AKA “Magnesia, Granmag, Heavy magnesium oxide, Calcined magnesia, Seawater magnesia, Anscor P, Animag, Magcal”

Synthetic

Ingredient Facts

Magnesium oxide

AKA: Magnesia, Granmag, Heavy magnesium oxide, Calcined magnesia, Seawater magnesia, Anscor P, Animag, Magcal

Synthetic · Absorbent · EWG: 4

Synthetic

Clean

A lightweight mineral powder that absorbs excess oil and moisture while creating a smooth, matte finish. It helps balance pH and gives products a creamy texture.

Solubility 0.009 % at 86 °F (NIOSH, 2024)

Formula

MgO

Mol. Weight

40.30

CAS #

1309-48-4

Form

Powder

State

Magnesium oxide appears as a white solid, often found as a powder. When fine particles of magnesium oxide are dispersed in air, whether directly or when generated by the burning or cutting of magnesiu

See origin →

Functions

Absorbent

Buffer

Opacifier

Absorbs Excess Oil

Stabilizes pH

Adds Opacity

Maintains optimal pH

Creates creamy opacity

Traditional Use

Magnesium oxide has been used in traditional cosmetics and medicine for centuries as a mild abrasive and drying agent. Historically incorporated into face powders and mineral-based skincare products for oil absorption.