Regulatory Status
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Safety Data
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Dermal Penetration Profile
Skin absorption and penetration characteristics of Cyclopentasiloxane, relevant to systemic exposure and MoS calculations.
Source: CIR
Expert Verdict
EU Reg 2024/1328 extended the D5 restriction from rinse-off only to all consumer and professional products at ≥0.1% w/w, enforced June 6, 2026. ECHA SVHC since 2018 for vPvB and endocrine disruption properties. SCCS concluded safe for human health at use levels but environmental vPvB classification drove regulatory action. Functional alternatives include caprylyl methicone, hemisqualane, and isoamyl laurate.
Regulatory Flags
Frequently Asked Questions
Is Cyclopentasiloxane safe in cosmetics?
EU Reg 2024/1328 extended the D5 restriction from rinse-off only to all consumer and professional products at ≥0.1% w/w, enforced June 6, 2026. ECHA SVHC since 2018 for vPvB and endocrine disruption properties. SCCS concluded safe for human health at use levels but environmental vPvB classification drove regulatory action. Functional alternatives include caprylyl methicone, hemisqualane, and isoamyl laurate. The EU classifies Cyclopentasiloxane as "restricted". Safety rating: MODERATE.
Is Cyclopentasiloxane allowed in the EU?
Cyclopentasiloxane EU regulatory status: restricted. Maximum allowed concentration: ≥0.1% w/w prohibited in all consumer and professional products under EU Reg 2024/1328; enforcement June 6, 2026. This is based on EU Regulation 1223/2009 and its amendments.
What does Cyclopentasiloxane do in cosmetics?
Cyclopentasiloxane functions as: solvent, emollient, volatile carrier, conditioning agent. It is classified as a cosmetic ingredient in our database. CAS number: 541-02-6.
What is the Margin of Safety for Cyclopentasiloxane?
adequate The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.
Compliance Tools
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Related Ingredients
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