Alumina Magnesium Metasilicate

What is Alumina Magnesium Metasilicate?

Alumina Magnesium Metasilicate is a synthetic inorganic compound formed by combining alumina, magnesium oxide, and silica through precipitation processes. It appears as a fine, white powder commonly incorporated into cosmetic formulations like powders, foundations, creams, and lotions. In products, it functions by drawing in and trapping excess sebum and moisture on the skin's surface, promoting a drier, less shiny appearance. As a bulking agent, it adds volume to enhance product structure without altering primary actives. Its viscosity-controlling properties help maintain consistent texture, preventing separation and improving application smoothness across anhydrous and emulsified systems.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Absorbent
Absorbs water and/or sebum to reduce greasiness and shine, improve dry touch, and help keep powders and emulsions feeling lighter on skin.
Bulking agent
Increases mass/volume to build structure and improve handling, commonly used to adjust feel, spread, and cost-in-use without acting as a primary active.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Absorbs sebum to minimize greasiness and provide a matte finish.

Builds product volume for better texture and easier handling.

Stabilizes thickness to ensure even dispensing and smooth feel.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals with oily skin seeking reduced shine.
People with known silicate sensitivities.
Users of powder-based makeup for improved wear.
Those preferring oil-rich moisturizers.
Those preferring lightweight, non-greasy formulations.
Users avoiding inorganic mineral powders.

Safety Notes

  • Rated low hazard by safety assessments for cosmetic use.
  • Non-comedogenic, unlikely to clog pores.

Frequently Asked Questions about Alumina Magnesium Metasilicate

What does it do in skincare?

It absorbs oils, bulks products, and controls viscosity for better texture.

Is it safe for daily use?

Yes, low hazard ratings support use in cosmetics at typical levels.

Does it cause breakouts?

Non-comedogenic rating of 0 indicates low pore-clogging risk.