MONTMORILLONITE
Montmorillonite
MONTMORILLONITE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.
Regulatory evidence by market
No rule for this ingredient has been imported for any of the 13 markets tracked here.
That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.
Chemical identity and properties
Bentonite
Montmorillonite is a subclass of smectite and a natural aluminomagnesium silicate clay, with potential protective effect for the digestive tract mucosa, and anti-inflammatory and anti-diarrheal activities. Although the exact mechanism of action has yet to be fully elucidated, upon administration, montmorillonite may adsorb bacteria, bacterial enterotoxins, viruses and other potentially diarrheagenic substances. It may also bind to mucin and modify mucus properties, thereby enhancing the mucus barrier function. — NCI Thesaurus (NCIt)
- IUPAC name
- dialuminum;tetrakis(dioxosilane);tris(oxygen(2-));hydrate
- Molecular formula
- Al2H2O12Si4
- Molecular weight
- 360.31 g/mol
- Exact mass
- 359.825408 Da
- Topological polar surface area
- 141.0 Ų
- Hydrogen-bond donors
- 1
- Hydrogen-bond acceptors
- 12
- Covalent units
- 10
- Defined stereocentres
- 0
Also known as
16 more reported names
Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.
Inventory details for MONTMORILLONITE
INCI name
MONTMORILLONITE
Description
Montmorillonite
Record provenance
- Inventory reference
- 35396
- Imported identity
- MONTMORILLONITE
- Source update
- 15/10/2010
Annex records for MONTMORILLONITE
Key data
- ABSORBENT
- Taking up water- and/or oil-soluble (dissolved or finely dispersed) substances.
- BULKING
- Non-reactive (chemically inert), solid ingredients that dilute other solids and/or increase the volume of cosmetic products.
- EMULSION STABILISING
- Helping the process of emulsification and improving emulsion stability and shelf-life.
- LIGHT STABILIZER
- Protecting the cosmetic product from deterioration effects of light.
- VISCOSITY CONTROLLING
- Increasing or decreasing the viscosity (thickness) of cosmetics.
Official EU ingredient-name evidence
The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.
Related inventory evidence
Ingredients with overlapping formulation functions
Additional official and scientific sources
11 external databases to check this identity in
Each link searches that source for this identity. What each source is, and its legal weight
How MONTMORILLONITE appears in the CosIng inventory
The CosIng inventory lists MONTMORILLONITE as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.
MONTMORILLONITE is also tagged with 5 cosmetic functions in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.
Frequently asked questions
Source note for MONTMORILLONITE
This page reproduces the CosIng inventory entry for MONTMORILLONITE from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.
Use this inventory page to research MONTMORILLONITE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.
Tools & next steps
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