Cyclopentasiloxane
环五聚二甲基硅氧烷
Also known as: D5, Cyclomethicone
What it does
- Lightweight silicone
- Slip agent
- Quick-evaporating carrier
Evidence
Strong evidenceCIR safe for cosmetic use. EU restricted in wash-off products >0.1% for environmental reasons.
Skin types
Well suited for: All
Evaporates quickly, leaving silky feel.
Irritation potential
Very Low
Comedogenic rating
0 / 5
Pregnancy
Generally considered safe during pregnancy
Safe.
Good to know
Volatile silicone—evaporates after application. Gives that 'silky' primer feel. Environmental concerns in EU.
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Analyze a productEducational information only — not medical advice. Always patch test and consult a dermatologist for skin concerns.