Ingredient

Cyclopentasiloxane

Mid risk

FunctionSilicone

What it is — Cyclopentasiloxane (INCI: Cyclopentasiloxane), also called D5, is a lightweight, fast-evaporating cyclic silicone carrier.

What it does — It is commonly used to give a smooth, silky, dry-touch slip and to help thin and spread heavier ingredients, leaving little residue as it evaporates.

Typical use — It appears in primers, hair serums, moisturizers and makeup.

Who it suits / good to know — Suits those who like a weightless finish. Cyclic siloxanes are effective texture agents but face growing environmental scrutiny in some regions.

Safety — DHALIORA grades it mid risk: considered well tolerated on skin, but cyclic siloxanes face environmental restrictions in some regions. This reflects the ingredient in general and is not medical advice; patch-test if your skin is easily irritated.

How grades are set — Risk reflects our own reading of publicly available safety data, an EWG-style reading shown at the worst-case grade we've assigned this ingredient across products. It isn't a third party's proprietary score, and it isn't medical advice. Always read the packaging and patch-test where indicated.
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