At a glance
- INCI name
- Dimethicone
- Function
- emollient, skin_conditioning, hair_conditioning, antifoaming, occlusive, slip_agent
- Typical use level
- 0.1%–30%
- Solubility
- oil
- Stable pH
- 3–11
CAS number and synonyms are sourced from PubChem. Function, usage levels, pH and compatibility are AI-assisted formulation guidance — verify against your supplier's technical data sheet and applicable regulations before use.
Compatibility
Works well with:
Cyclomethicone Cyclopentasiloxane Isododecane Isohexadecane Mineral Oil C12-15 Alkyl Benzoate Caprylic/Capric Triglyceride Niacinamide Glycerin Hyaluronic Acid
Use caution with:
High-concentration Anionic Surfactants
Dimethicone is broadly compatible with most cosmetic raw materials and is considered chemically inert across a wide pH range. It does not mix with water and requires proper emulsification (typically with silicone-compatible emulsifiers such as PEG/PPG dimethicone or cetyl dimethicone) for use in water-based systems. High concentrations of anionic surfactants can destabilize emulsions containing dimethicone by competing at the interface.
Formulation notes
Viscosity grade must be specified (e.g., 200, 350, 1000 cSt) as it significantly affects texture and application. Low-viscosity grades (5–50 cSt) act as light spreading agents; high-viscosity grades (350+ cSt) provide occlusion and slip. Generally regarded as safe; no significant regulatory restrictions in cosmetics. Not biodegradable — environmental considerations apply for rinse-off formulations.
Related ingredients
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