Propyl Trisiloxane

INCI: PROPYL TRISILOXANE

CAS Number
18395-18-7 (propylheptamethyltrisiloxane form)
Function
Skin conditioning, Emollient, Solvent
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted for use in cosmetics

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
low
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Must verify D4/D5 cyclosiloxane impurity levels (EU restriction); environmental persistence concerns for siloxanes; octamethyltrisiloxane CAS 107-51-7 is the parent structure

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Concern Level: Low

Frequently Asked Questions

Is Propyl Trisiloxane safe in cosmetics?

Must verify D4/D5 cyclosiloxane impurity levels (EU restriction); environmental persistence concerns for siloxanes; octamethyltrisiloxane CAS 107-51-7 is the parent structure The EU classifies Propyl Trisiloxane as "permitted". Safety rating: GOOD.

Is Propyl Trisiloxane allowed in the EU?

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

What does Propyl Trisiloxane do in cosmetics?

Propyl Trisiloxane functions as: Skin conditioning, Emollient, Solvent. It is classified as a cosmetic ingredient in our database. CAS number: 18395-18-7 (propylheptamethyltrisiloxane form).

What is the Margin of Safety for Propyl Trisiloxane?

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.

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