Montmorillonite is a naturally occurring smectite clay mineral known for its high surface area, swelling capacity, absorbency and rheology-modifying properties. It is an important mineral component of several natural clay materials and is widely considered for cosmetic formulations requiring oil absorption, thickening, suspension and texture modification.
Montmorillonite has a layered structure that allows it to interact with water and undergo hydration and swelling. This property can create a structured dispersion and contribute to viscosity and suspension stability in suitable cosmetic formulations.
The characteristics of Montmorillonite can vary depending on its geological origin, mineral purity, particle size, exchangeable cations and processing. Sodium-dominant and calcium-dominant forms can exhibit different swelling and rheological behaviour.
In cosmetic and personal-care formulations, suitable grades may be used in face masks, cleansers, skin-care products, powders, makeup and other clay-based formulations.
Montmorillonite is a phyllosilicate mineral belonging to the smectite group. It has a layered structure consisting primarily of aluminosilicate sheets.
It can provide:
| Parameter | Details |
|---|---|
| Product Name | Montmorillonite |
| INCI Name | Montmorillonite |
| Chemical Class | Smectite Clay / Phyllosilicate |
| Mineral Group | Smectite |
| Physical Form | Fine Powder |
| Appearance | White, cream, beige, grey or other natural mineral colour; grade-dependent |
| Water Behaviour | Hydrates, swells and disperses |
| Water Solubility | Insoluble |
| Main Functions | Absorbent, Thickener, Suspending Agent, Rheology Modifier |
| Main Applications | Skin Care, Face Masks, Cleansers, Makeup, Personal Care |
CAS No.: 1318-93-0
INCI Name: Montmorillonite
Montmorillonite is a naturally occurring clay mineral rather than a simple compound with one fixed stoichiometric composition.
Its structure is commonly described as a hydrated aluminium-rich layered silicate containing variable amounts of:
The exact composition varies according to the mineral source and grade.
Therefore, a single fixed molecular formula should not be used as a universal specification for all commercial Montmorillonite materials.
Montmorillonite has a layered silicate structure with a high affinity for water.
When hydrated, water can enter between the clay layers, causing the material to expand or swell.
This characteristic can contribute to:
The extent of swelling depends on the mineral composition, exchangeable ions and grade.
Sodium-dominant Montmorillonite generally exhibits:
Calcium-dominant Montmorillonite generally exhibits:
The appropriate grade should therefore be selected according to the intended cosmetic application.
Montmorillonite has a large active surface area and can interact with oils, moisture and other substances.
Suitable cosmetic grades can therefore be used in:
Its absorption performance depends on particle size, surface characteristics, mineral composition and processing.
Montmorillonite can provide several useful characteristics in clay-based face masks.
It can contribute to:
It can be combined with other cosmetic clays, gums and suitable active or functional ingredients.
Suitable grades can be incorporated into selected cleansing formulations to provide:
It can be used in clay-based cleansers and specialty cleansing formulations.
Potential applications include:
Suitable cosmetic grades may also be used in selected makeup formulations.
Potential applications include:
It can contribute to formulation structure, suspension and texture.
Hydrated Montmorillonite can modify the rheology of aqueous formulations.
Potential benefits include:
Performance depends on:
Montmorillonite can form a structured clay network when properly hydrated.
This can help suspend:
The degree of suspension depends on the formulation and clay grade.
When using Montmorillonite, formulators should evaluate:
Proper dispersion and hydration are important for achieving consistent performance.
Poor processing may result in:
Processing conditions should follow the technical documentation for the selected grade.
Montmorillonite can be used in suitable:
Montmorillonite is a smectite-group clay mineral with a layered structure and strong hydration and swelling characteristics.
The commonly referenced CAS number is 1318-93-0.
The INCI name is Montmorillonite.
It is used as an absorbent, thickener, suspending agent and rheology modifier in suitable cosmetic formulations.
No. Montmorillonite is generally insoluble but hydrates, swells and disperses in water.
Yes. Properly hydrated Montmorillonite can increase viscosity and provide rheological structure.
Yes. Suitable grades can absorb oils and moisture due to their mineral surface characteristics.
Yes. It is suitable for various clay-based and mineral face-mask formulations.
Montmorillonite is a specific smectite clay mineral, while Bentonite is a natural clay material composed predominantly of smectite minerals, particularly montmorillonite.
No. Montmorillonite is a smectite clay with significant swelling capacity, whereas Kaolin is primarily kaolinite and generally has much lower swelling.
| Parameter | Specification |
|---|---|
| Appearance | White to off-white powder |