Stearalkonium Hectorite
Modified clay (hectorite) with an organic cation. Thickens anhydrous oil formulas – the base of liquid lipsticks, gel mascaras, oil-based mineral sunscreens. Often paired with propylene carbonate (activator). Does not act on or penetrate the skin.
Supporting ingredient
It gives a product its texture, stability or shelf life. It has no claimed effect on the skin, so an efficacy tier does not apply. What is known about its safety is below
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Stearalkonium Hectorite (Bentone 38) is a modified clay (hectorite) with a long-chain quaternary ammonium cation. Used as a thickener for anhydrous oil formulas. Mechanism. With an activator (propylene carbonate, benzyl alcohol) the clay platelets swell in oil and form a thixotropic gel. This thickens pure oil systems without water. Where applied. Liquid lipsticks, gel mascaras, oil-based mineral sunscreens, primers. Rare in skincare, mostly in colour cosmetics. Safety. CIR confirmed safety at cosmetic concentrations. Does not act on skin, does not penetrate, non-comedogenic. Pregnancy and lactation – safe.
Frequently asked questions
Is Stearalkonium Hectorite safe during pregnancy?
Stearalkonium Hectorite is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Stearalkonium Hectorite for?
Stearalkonium Hectorite suits: normal, dry, combination, oily, sensitive.
What is Stearalkonium Hectorite and what does it do in cosmetics?
Modified clay (hectorite) with an organic cation.
What's the INCI name for Stearalkonium Hectorite?
The INCI name is Stearalkonium Hectorite. It may also appear as: Bentone 38.
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Similar role in the formula
Other functional ingredients
Stearamidopropyl Dimethylamine, Steareth-10, Steareth-2, Steareth-20, C13-15 Alkane, Disodium Succinate, Neutralized Carbomer, Polyquaternium-11
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