Ingredient guide ›

Cyclopentasiloxane

The quick-dry silicone.

What it does

A light silicone that helps products spread, then evaporates, leaving skin and hair silky.

Good to know

Independent EU scientists (SCCS) found it safe in cosmetics, except in hair sprays and spray sunscreens. The EU is limiting it to protect the environment, because it breaks down slowly.

Often found in: Deodorants, Antiperspirants, Sunscreens, Hair care

Around the world

• United States: No FDA limit. The FDA doesn't approve cosmetic ingredients before sale. Source
• EU and UK: EU: max 0.1% in rinse-off products since 2020 and in leave-on products from June 2027. UK: rinse-off limit only. Source
• Canada: Not on Health Canada's Hotlist of restricted ingredients. Source
• Australia: No limit in Australia's Poisons Standard. Source

Sources

• SCCS opinion: Cyclopentasiloxane (D5) in cosmetic products (2016) (Independent)