Is Stearyl Triethoxysilane safe in cosmetics?
Stearyl Triethoxysilane has a safety rating of "GOOD" in our database. EU status: permitted. US status: permitted.
Good
Cosmetic Ingredient
Stearyl Triethoxysilane
Also known as: Trimethoxyoctadecylsilane, n-Octadecyltrimethoxysilane, Dynasylan 9118, LSX 6817
INCI: STEARYL TRIETHOXYSILANE
Stearyl Triethoxysilane (CAS 3069-42-9) is a cosmetic cosmetic ingredient functioning as Binding (pigment surface treatment/coating). EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.
View industrial chemical safety profile for CAS 3069-42-9 →
Auto-generated CPSR Part A draft with source citations
Function
Binding (pigment surface treatment/coating)
Safety Rating
GOOD
Chemistry & Identifiers
IUPAC Name
trimethoxy(octadecyl)silane
InChIKey
SLYCYWCVSGPDFR-UHFFFAOYSA-N
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
Permitted for cosmetic use; analogous triethoxysilanes reviewed favorably by CIR
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Stearyl Triethoxysilane.
Calculate MoS for your specific formulation with the MoS Calculator.
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
1 - 10 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Adhesion/cohesion promoter
Wetting agent (non-aqueous)
Expert Verdict
Expert safety assessment and concern-level summary for Stearyl Triethoxysilane.
Known Synonyms
Trimethoxyoctadecylsilane
n-Octadecyltrimethoxysilane
Dynasylan 9118
LSX 6817
Chemical Function
Adhesion/cohesion promoter
Wetting agent (non-aqueous)
Australian Status
AICIS status: listed
Frequently Asked Questions
Is Stearyl Triethoxysilane allowed in the EU?
Stearyl Triethoxysilane EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Stearyl Triethoxysilane do in cosmetics?
Stearyl Triethoxysilane functions as: Binding (pigment surface treatment/coating). It is classified as a cosmetic ingredient in our database. CAS number: 3069-42-9.
Is Stearyl Triethoxysilane used outside cosmetics?
Stearyl Triethoxysilane also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Compliance Tools
Check Stearyl Triethoxysilane 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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