Montmorillonite — Allergy Risk & Safety Profile
INCI: MONTMORILLONITE
Key Facts
- CAS Number
- 1318-93-0
- Category
- filler
- Risk Level
- low
- Common Allergen
- No
- Found In
- clay mask
Is Montmorillonite safe in cosmetics?
Montmorillonite is rated low risk in cosmetic products. It is not classified as a common allergen and is generally well-tolerated by most skin types. Commonly found in clay mask.
What is Montmorillonite?
Montmorillonite is a filler commonly used in cosmetic and personal care products. It is generally considered safe for use in cosmetics at recommended concentrations.
Allergy & Safety Information
Montmorillonite is considered safe for cosmetic use at typical concentrations.
This ingredient is considered low risk from an allergenicity perspective. Reactions are uncommon at typical cosmetic use concentrations. However, no ingredient is universally safe — if you notice redness, itching, or irritation after using a product containing this ingredient, discontinue use and monitor whether symptoms resolve.
How to Identify Montmorillonite in Products
Cosmetic ingredients are listed by their INCI (International Nomenclature of Cosmetic Ingredients) name in descending order of concentration. To check whether a product contains Montmorillonite, scan the ingredient list for its INCI name exactly as it appears above. Ingredients present at 1% or less may appear in any order after the 1% threshold.
Product types to prioritise checking: Clay mask. These product categories are the most common sources of Montmorillonite exposure based on formulation data.
Not sure if your products contain Montmorillonite? Paste the ingredient list into the free ingredient checker to scan for Montmorillonite and other allergens automatically.
Frequently Asked Questions
Is Montmorillonite safe for sensitive skin?
Montmorillonite is generally well-tolerated, even by sensitive skin.
What products contain Montmorillonite?
Montmorillonite is commonly found in clay mask.
What does Montmorillonite do in cosmetics?
Montmorillonite functions as a filler in formulations.
Related Guides
Is Montmorillonite causing YOUR skin reactions?
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