Aluminum Hydroxide

Aluminum Hydroxide at a Glance

• Found naturally in certain minerals
• Opacifying agent, skin protectant, and absorbent
• Ruled safe as used in cosmetics
• Also used as an antacid

Aluminum Hydroxide Description

Aluminum hydroxide is an inorganic material found naturally in the minerals bauxite and gibbsite. In medical settings it serves as an antacid (and is available over the counter in a number of antacid formulations).

In cosmetics, aluminum hydroxide is quite versatile: it’s employed as an opacifying agent, skin protectant, texture enhancer and absorbent. It also functions as a coloring agent, but perhaps its most important role is a coating agent for mineral UV filters such as titanium dioxide. In this role, it helps prevent the breakdown of titanium dioxide, preventing the formation of free radicals on skin.

Note: In some sunscreens with mineral filters, the aluminum hydroxide derivative alumina is used.

The independent Cosmetic Ingredient Review has ruled aluminum hydroxide safe in its current use in cosmetics.

Aluminum Hydroxide References