Hexyltrimethoxysilane

INCI: HEXYLTRIMETHOXYSILANE

CAS Number
3069-19-0
Function
Surface modifier / hair and skin conditioning (silane-based hydrophobic coating agent)
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted โ€” not specifically restricted under 21 CFR; listed on EPA TSCA inventory

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
low
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Releases methanol upon hydrolysis (3 methoxy groups); skin and eye irritation potential; requires concentration-dependent irritation testing in final formulation; no CIR or SCCS opinion exists

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Concern Level: Moderate

Frequently Asked Questions

Is Hexyltrimethoxysilane safe in cosmetics?

Releases methanol upon hydrolysis (3 methoxy groups); skin and eye irritation potential; requires concentration-dependent irritation testing in final formulation; no CIR or SCCS opinion exists The EU classifies Hexyltrimethoxysilane as "permitted". Safety rating: MODERATE.

Is Hexyltrimethoxysilane allowed in the EU?

Hexyltrimethoxysilane EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Hexyltrimethoxysilane do in cosmetics?

Hexyltrimethoxysilane functions as: Surface modifier / hair and skin conditioning (silane-based hydrophobic coating agent). It is classified as a cosmetic ingredient in our database. CAS number: 3069-19-0.

What is the Margin of Safety for Hexyltrimethoxysilane?

not established 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.

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