Is Cyclohexasiloxane safe in cosmetics?
Cyclohexasiloxane has a safety rating of "MODERATE" in our database. EU status: restricted. US status: permitted.
Moderate
Cosmetic Ingredient
Cyclohexasiloxane
INCI: CYCLOHEXASILOXANE
Cyclohexasiloxane (CAS 540-97-6) is a cosmetic cosmetic ingredient functioning as solvent, emollient, volatile carrier. EU Regulation 1223/2009 status: restricted, max ≥0.1% w/w prohibited in all consumer and professional products under EU Reg 2024/1328; enforcement June 6, 2026. Industrial safety data is also available in the chemical safety database.
View industrial chemical safety profile for CAS 540-97-6 →
Auto-generated CPSR Part A draft with source citations
Function
solvent, emollient, volatile carrier
Safety Rating
MODERATE
Chemistry & Identifiers
EC Number
208-762-8
Regulatory Status
EU EU Status
restricted
EU Max Conc.
≥0.1% w/w prohibited in all consumer and professional products under EU Reg 2024/1328; enforcement June 6, 2026
US US Status
permitted
US Notes
No FDA restriction; no US restriction as of 2026
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Cyclohexasiloxane.
Calculate MoS for your specific formulation with the MoS Calculator.
Expert Verdict
Expert safety assessment and concern-level summary for Cyclohexasiloxane.
Regulatory Flags
svhc
vpvb
eu-restricted-2026
reach-reg-2024-1328
bioaccumulative
environmental-hazard
volatile-silicone
cyclic-siloxane
pops-candidate
reformulate-required
Frequently Asked Questions
Is Cyclohexasiloxane allowed in the EU?
Cyclohexasiloxane 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 Cyclohexasiloxane do in cosmetics?
Cyclohexasiloxane functions as: solvent, emollient, volatile carrier. It is classified as a cosmetic ingredient in our database. CAS number: 540-97-6.
Compliance Tools
Check Cyclohexasiloxane compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
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MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
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Paste any INCI list into the Decoder for instant safety analysis, or calculate the Margin of Safety for Cyclohexasiloxane in your formulation.