When will Cyclohexasiloxane (D6) be banned in cosmetics in the EU?
Under the EU REACH Regulation, D6 will be prohibited in rinse-off cosmetics from June 6, 2026, and in leave-on cosmetics from June 6, 2027. Companies using D6 should prepare for compliance before these deadlines.
What are the key REACH deadlines for D6 in cosmetic products?
On June 6, 2026, a significant regulatory milestone will take effect under the European Union’s REACH Regulation: the use of Cyclohexasiloxane (D6, INCI: Cyclohexasiloxane) in rinse-off cosmetic products will be prohibited. One year later, on June 6, 2027, the restriction will be extended to leave-on cosmetic products, further limiting the use of this widely employed silicone ingredient across the cosmetics sector.
Why is Cyclohexasiloxane (D6) under increasing regulatory scrutiny?
D6 belongs to a group of cyclic volatile methyl siloxanes (cVMS), which also includes D4 and D5. These substances have been subject to increasing regulatory scrutiny due to concerns regarding:
- environmental persistence
- bioaccumulation potential
- widespread release into aquatic ecosystems
Scientific assessments conducted at the European level identified D6 as a substance that may pose long-term environmental risks, particularly when released through consumer products.
Which REACH regulation introduced the D6 ban?
The restriction was introduced thanks to Regulation 2024/1138 that revised Annex XVII of the REACH Regulation as part of broader efforts to reduce emissions of persistent and bioaccumulative substances into the environment. The initial focus on rinse-off products reflects the direct pathway through which these products are washed into wastewater systems and subsequently discharged into the environment.
What actions should cosmetic companies take before the D6 ban takes effect?
For cosmetic manufacturers, importers, and brand owners, the approaching deadlines require careful review of product portfolios and formulations. Companies should verify whether D6 is present in existing products, assess alternative ingredients, and ensure that reformulation activities are completed well before the applicable compliance dates. Particular attention should be paid to products marketed in the European Union, as non-compliant products may no longer be placed on the market after the restrictions enter into force.
What is the conclusion of the EU D6 ban under REACH and its impact on cosmetics?
The upcoming bans represent another step in the EU’s strategy to promote safer and more sustainable chemicals management, reinforcing the industry’s ongoing transition toward environmentally responsible cosmetic formulations.