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Magnesium Aluminum Silicate

Irritancy: 0
Comedogenicity: 0

Official CosIng Information


A type of clay mineral that works as a nice helper ingredient to thicken and stabilize formulas. As a clay, it consists of platelets that have a negative charge on the surface (face) and a positive on the edge. So the face of one platelet attracts the edge of the other and this builds a so-called "house of card" structure meaning that Magnesium Aluminum Silicate (MAS) thickens up products and helps to suspend non-soluble particles such as color pigments or inorganic sunscreens (zinc oxide and titanium dioxide).

As the "house of card" structure takes some time to form but collapses quickly if the formula is stirred, products thickened with MAS can be thick in the jar but become easily spreadable upon application (called thixotropy). MAS also gives nice sensory properties, it is not tacky or sticky and gives a rich, creamy skin feel. Also a good team player and works in synergy with other thickeners such as Cellulose Gum or Xanthan Gum

Show me some proof

  • International Federation of Societies of Cosmetic Chemists Monograph number 3, An introduction to rheology

Products with Magnesium Aluminum Silicate

Becca Ever-Matte Poreless Priming Perfector Brickell Men's Products Purifying Charcoal Face Mask For Men Remescar Eye Bags & Dark Circles Tata Harper Clarifying Spot Solution Venofye Viperlift Bio Syringe Yes to Carrots Vitamin-Enriched Kale Diy Powder-To-Clay Mask BLACK TRUFFLE Instant Repair Syringe GLAMGLOW SUPERCLEANSE™ Cream-To-Foam Cleanser GLAMGLOW Supermud Clearing Treatment GLAMGLOW TROPICALCLEANSE™ Daily Exfoliating Cleanser GLAMGLOW Youthmud Glow Stimulating Treatment Mask Mario Badescu Enzyme Revitalizing Mask My perfect cosmetics My Perfect Eyes Proactiv Step 1 Cleanser Revolution Skincare Charcoal Purifying Face Mask Revolution Skincare Pink Clay Detoxifying Face Mask Superdrug B. Glowing Clay Face Mask Vine Vera Resveratrol Shiraz Instentic Non-Surgical Syringe Anne Semonin Mineral Mask Anthony Algae Facial Cleanser Beauty Counter Counter+ Charcoal Facial Mask Burt's Bees Detoxifying Clay Mask Clinique Acne Solutions Oil-Control Cleansing Mask DECLÉOR Phytopeel Exfoliating Cream GLAMGLOW Youthmud Tinglexfoliate Treatment Glossier Mega Greens Galaxy Pack Glossier Mega Greens Galaxy Pack Lavelier Advanced Marine Bio-Syringe Perricone MD Thio:Plex Intensive 2-Step Brightening System [Step 1: Intensive Base] StriVectin Hyperlift Eye™ Instant Eye Fix The Body Shop Himalayan Charcoal Purifying Glow Mask URANG Clarifying Blue Mask With Natural Jojoba Beads Uriage Bariéderm Drying Repairing Cica-Spray dr. denese Black Clay Firming Facial Mask eve lom Dynaspot AOA Studio Halo Highlighter Algenist Perfect Clarifying Pore Corrector Mask Amie Spring Clean Deep Cleansing Mask Apivita Express Purifying Face Mask For Oily Skin (Propolis) BCL Tsururi Ghassoul Mineral Clay Pack Botanical Lab Clay & Sulfur Drying Lotion Bruno Vassari Scrub & Mask Clinique City Block Purifying Charcoal Clay Mask + Scrub Freeman beauty Detoxifying Charcoal + Black Sugar GLAMGLOW POWERMUD™ Dualcleanse Treatment Clay Mask Jack Black Deep Dive® Glycolic Facial Cleanser Max Love Primer Hd Pré Maquiagem Facial OSEA Ocean Cleansing Mudd PCA Skin Detoxifying Mask Peter Thomas Roth Potent C Targeted Spot Brightener