Cyclopentasiloxane (D5)

Medium Concern

Silicone

Also known as

cyclopentasiloxaned5decamethylcyclopentasiloxane

The concern

Silicone compound used in hair care and moisturisers. EU classified it as a persistent, bioaccumulative, and toxic (PBT) substance. Banned in wash-off cosmetics in the EU from 2020. Detected in wildlife and water systems.

Read the source: EU ECHA

What to look for on labels

This ingredient may appear under any of the following names or codes on product labels:

Cyclopentasiloxane (D5)
cyclopentasiloxane
d5
decamethylcyclopentasiloxane

Learn more

Read the full evidence directly from the authoritative source.

View source — EU ECHA

Data sourced from IARC, FDA, EFSA, WHO and EWG public data. For informational purposes only. This does not constitute medical or legal advice.

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