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The EU Silicone Ban: What It Means for Formulators

The EU Silicone Ban: What It Means for Formulators


Starting June 6, 2027, the European Union will enforce new restrictions under the REACH (Registration, Evaluation, Authorisation, and Restriction of Chemicals) regulation, targeting specific cyclic silicones used in cosmetics.


What’s Changing?

The updated regulation limits the use of the following silicones to a maximum concentration of 0.1% in both rinse-off and leave-on cosmetic products sold within the EU:

  • Octamethylcyclotetrasiloxane (D4)

  • Decamethylcyclopentasiloxane (D5)

  • Dodecamethylcyclohexasiloxane (D6)


This follows previous measures:

  • D4 had already been fully banned.

  • D5 was previously restricted to ≤0.1% in rinse-off products.Now, the restriction extends to all product types, including leave-on cosmetics.

🌍 Why the Ban?

According to the European Chemicals Agency (ECHA), D4, D5, and D6 are classified as very persistent and very bioaccumulative (vPvB) substances.They do not readily degrade in the environment and can accumulate in aquatic and terrestrial ecosystems, leading to long-term environmental risks. While potential human health risks are still under review, the primary concern driving these restrictions is environmental impact.


🏷️ What About Existing Products?

Businesses with pre-manufactured stock are being given a three-year grace period to deplete inventory.This timeline is fairly standard, as it aligns with the typical shelf life of a stable cosmetic product. After this grace period, any products exceeding the 0.1% concentration limit will no longer be permitted for sale in the EU.


🔬 What Formulators Can Use Instead

It’s important to note that not all silicones are being restricted—only these specific cyclic types.However, since Cyclomethicone (a common blend of D4 and D5) is directly affected, formulators will need to explore alternative emollients that mimic its volatility and

lightweight feel.


Recommended Substitutes:

  • Hemisqualane (INCI: C13–15 Alkane)

    • A COSMOS-approved, biodegradable alternative to Cyclomethicone.

    • Provides excellent spreadability and a dry, silky finish.

    • Available at Windy Point

  • SiClone® SR-5 (Cyclomethicone Replacement)

    • INCI: Isohexadecane (and) Isododecane (and) C13–15 Alkane

    • Designed to replicate Cyclomethicone’s light, volatile texture.


Currently, these are among the few small-scale options accessible to formulators in Canada and the USA. EU-based formulators may have additional region-specific suppliers carrying compliant silicone alternatives.


💡 Formulating Tips

Cyclomethicone is extremely light and evaporates quickly, giving a weightless finish that’s difficult to replicate perfectly. To achieve a similar sensory profile, formulators may need to:

  • Blend multiple substitutes for optimal texture and volatility.

  • Adjust usage rates to fine-tune slip, absorption, and spreadability.


⚠️ Final Note

Not every silicone ingredient is affected by this amendment—Dimethicone and other linear silicones remain permitted under current EU cosmetic regulations. To avoid confusion, I’ll be posting a follow-up article focusing on Dimethicone replacements and sustainable silicone alternatives for modern formulations.

 
 
 

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