Bentonite (CAS 1302-78-9) — Woody Fragrance Ingredient
Bentonite
CAS 1302-78-9
What Is Bentonite?
Bentonite is a natural clay mineral widely used in cosmetics and personal care products. People encounter it in face masks, dry shampoos, and as a thickening agent. Its importance lies in its ability to absorb oils and impurities, making it valuable for skincare and fragrance formulations where texture and stability are key.
Safety Profile
GENERALLY SAFEWhat Does Bentonite Smell Like?
Bentonite itself is odorless, but its earthy, mineral character can enhance the grounding qualities of a fragrance. It provides a dry, powdery texture that blends well with woody and amber accords, adding depth and a tactile dimension to perfumes.
Scent Profile
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Bentonite’s mineral quality complements the flint accord, adding an earthy, rugged texture to the citrus and woody notes.
Chemistry, Properties & Perfumer Guide
The Chemistry
Bentonite is a phyllosilicate clay primarily composed of montmorillonite. It forms from volcanic ash weathering and is known for its high absorption capacity. Its layered structure allows it to swell in water, making it useful in various applications from cosmetics to industrial uses.
Physical & Chemical Properties
| Appearance | Fine powder, white to light brown |
|---|---|
| Density | 2.5 g/cm³ |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Face Masks | 10-20% | Up to 50% | Absorbs oils and impurities |
| Dry Shampoos | 5-15% | Up to 30% | Provides texture and oil control |
Classic Accords
Tip: Use bentonite to add texture and absorbency in powder-based fragrances.
Alternatives & Comparisons
A milder clay alternative with similar absorbent properties, suitable for sensitive skin.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. IFRA, REACH, EU Cosmetics Regulation standards update periodically. Consult current IFRA Standards Library before formulating. Not legal or regulatory advice.
IFRA Status
No restrictions by IFRA.
RIFM Assessment
RIFM considers bentonite safe for use in cosmetics.
Sustainability
Bentonite is sustainably mined and has a low environmental impact. Its natural abundance and non-toxic nature make it a preferred choice in eco-conscious formulations.
Explore Bentonite
Browse essential oils and aroma compounds.
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References
- Grim, R.E. (1968). Clay Mineralogy. McGraw-Hill.
- PubChem Bentonite Link
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Mar 2026.
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