Cyclic silicones (D4/D5) in cosmetics: why it's flagged
Short answer
Cyclic silicones (D4/D5) is flagged by Olive Detective as a low concern in cosmetics. Emollient silicones; D4/D5 flagged as PBT / endocrine in the EU. The flag is class-level and precautionary, based on ECHA SVHC (D4/D5/D6); EU restriction — it describes the ingredient class, not the safety of any particular product.
What the concern is
- Endocrine concern — the class has been examined for hormone-disrupting activity.
- pollutant — flagged for review.
How it appears on an INCI list
Cosmetic labels use INCI names, which are standardised worldwide, so the same wording appears on a product bought anywhere. This class is matched on cyclotetrasiloxane, cyclopentasiloxane, cyclohexasiloxane, cyclomethicone.
How it affects the score
Cosmetic scoring follows the Yuka method: a product with only green and yellow ingredients has its score floored at 50, any orange ingredient caps it below 50, and any red caps it below 25. This ingredient is yellow, so it does not cap a product's score by itself.
Source: ECHA SVHC (D4/D5/D6); EU restriction
Other cosmetic ingredients we flag
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