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HECTORITE

Last update on Dec 11, 2025

Hectorite is a naturally occurring smectite clay mineral. It is valued in cosmetics for its excellent thickening and suspending properties. This rare, lithium-rich clay provides thixotropic gel formation, enabling stable emulsions and suspensions without separation. It is particularly effective in aqueous systems, such as creams, masks, cleansers and foundations, where it enhances texture, stability and spreadability. Its clean, mineral origin aligns with natural and mineral makeup trends, supporting matte finishes and oil absorption in color cosmetics.

CAS Number: 12173-47-6Chem/IUPAC Name: HectoriteEINECS/ELINCS No: 235-340-0COSING REF No: 34228

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What is HECTORITE used for?

  • Viscosity controlling: Builds thixotropic gels for improved flow and application. Commonly used in creams, lotions and gels to achieve desired thickness.
  • Suspending agent: Prevents settling of pigments and particles. Ideal for foundations, sunscreens and masks to maintain uniformity.
  • Absorbent/Bulking: Absorbs excess oil and reduces bulk density. Frequently incorporated in mattifying powders, face masks and oil-control products.

Origin

Hectorite is a naturally occurring phyllosilicate clay from the smectite group. It is primarily mined from deposits in California, USA, with limited sources worldwide. It forms as an alteration product of volcanic ash and tuff. The raw material is purified through dispersion in water, removal of impurities like grit and quartz via sedimentation and centrifugation, followed by drying and milling to produce a fine, white powder suitable for cosmetic applications.

What does HECTORITE do in a formulation?

ABSORBENT|
BULKING|
VISCOSITY CONTROLLING

Safety Profile

Hectorite is considered safe for cosmetic use, as assessed by the CIR Expert Panel for silicate clays. It shows no significant irritation or sensitization at typical concentrations of 0.5 to 10%. It carries a low hazard rating and is well-tolerated in leave-on and rinse-off products. Potential concerns are limited to dust inhalation during handling or trace crystalline silica in unpurified forms. Approved by the EU COSING database for viscosity controlling, bulking and absorbent functions.

HECTORITE alternatives

HECTORITE technical profile

PropertyValues
Boiling PointDecomposes (inorganic mineral)
Melting Point>1000°C (decomposes)
pH8.5 - 10.0
SolubilityInsoluble in water
ViscosityHigh