Bentonite — Allergy Risk & Safety Profile
INCI: BENTONITE
Also known as: Montmorillonite
Key Facts
- CAS Number
- 1302-78-9
- Category
- filler
- Risk Level
- low
- Common Allergen
- No
- Found In
- clay mask, foundation
Is Bentonite safe in cosmetics?
Bentonite 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, foundation.
What is Bentonite?
Bentonite 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
Bentonite is considered safe for cosmetic use. No significant safety concerns have been identified at typical use concentrations. As with any cosmetic ingredient, discontinue use if irritation occurs.
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 Bentonite 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 Bentonite, 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, Foundation. These product categories are the most common sources of Bentonite exposure based on formulation data.
Not sure if your products contain Bentonite? Paste the ingredient list into the free ingredient checker to scan for Bentonite and other allergens automatically.
Frequently Asked Questions
Is Bentonite safe for sensitive skin?
Bentonite is generally well-tolerated, even by sensitive skin types.
What products contain Bentonite?
Bentonite is commonly found in clay mask, foundation.
What does Bentonite do in cosmetics?
Bentonite functions as a filler in formulations.
Related Guides
Is Bentonite causing YOUR skin reactions?
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