Bentonite, a naturally occurring clay composed mainly of montmorillonite, is widely used in the cosmetic industry due to its absorbent, thickening, and stabilizing properties. Its ability to absorb water and oils while providing a smooth texture makes it a versatile ingredient in various personal care products, from face masks to cleansers.
Characteristics of Bentonite for Cosmetics
- Composition: Primarily montmorillonite, with possible trace amounts of other minerals.
- Appearance: Fine, grayish or cream-colored powder.
- Odor: Odorless.
- Solubility: Insoluble in water but swells and forms a gel when mixed with water.
- Origin: Derived from the weathering of volcanic ash.
Benefits of Bentonite in Cosmetics
- Absorbency: Bentonite can absorb excess oil and sebum from the skin, making it ideal for oily or acne-prone skin types.
- Thickening Agent: It acts as a thickening agent, providing consistency to cosmetic products.
- Detoxification: Bentonite has detoxifying properties, often used in face masks to draw out impurities and toxins from the skin.
- Stabilization: It helps stabilize emulsions and suspensions in various skincare formulations.
Common Uses of Bentonite in Cosmetics
Skincare Products
Bentonite is frequently used in skincare products for its oil-absorbing and detoxifying properties. Common applications and recommended usage percentages include:
- Face Masks: To absorb excess oil and remove impurities, typically used at 1–10%.
- Cleansers: To enhance texture and provide a gentle exfoliating effect.
- Acne Treatments: To control oil and minimize breakouts.
Hair Care Products
In hair care, bentonite is used for its thickening and conditioning properties. It is commonly found in:
- Hair Masks: To add thickness and remove excess oil from the scalp.
- Dry Shampoos: To absorb oils and freshen hair without water.
Deodorants
Bentonite is also used in natural deodorants for its moisture-absorbing properties. It helps keep underarms dry and reduces odor.
Product Specifications
- INCI Name: Bentonite
- CAS No: 1302-78-9
- Product Type: Cosmetic ingredient
- Usage: Skincare, hair care, deodorants
- Purity: Typically 95–99%.
- Shelf Life: 2 years or more, depending on storage conditions.
Storage and Handling
Store bentonite in a cool, dry place, in a sealed container to prevent contamination and moisture absorption. Keep it away from direct sunlight to maintain quality and consistency.