Cyclohexasiloxane
Avoid
Official INCI name
D6, a volatile silicone like D4 and D5. Fine on skin, but persistent in the environment — the EU restricts it in leave-on and wash-off products from 2026.
What it does
Emollient. Oils, butters, esters and silicones that soften and smooth.
Worth knowing
Persists in the environment or harms aquatic life (e.g. microplastics, some UV filters).
Also written as
Scans recognise it under every one of these names.
D6
“Cyclohexasiloxane” is its name in the EU glossary of common ingredient names (no. 7853), the names labels in the EU must use. © European Union, EUR-Lex.