Bis-Mercaptopropyl Dimethicone

INCI: BIS-MERCAPTOPROPYL DIMETHICONE

CAS Number
Not publicly assigned in CosIng
Function
Hair conditioning, skin conditioning (emollient), thiol-functional silicone crosslinker
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes CIR reviewed Dimethicone Crosspolymers (2014) covering 62 dimethicone crosspolymer ingredients โ€” concluded safe as used when formulated to be non-irritating

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
negligible
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Mercapto (โ€“SH) functional groups are reactive with potential for thiol-mediated irritation if unreacted monomer is present; residual mercaptopropyl content must be verified and thiol odor managed.

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Concern Level: Moderate

Frequently Asked Questions

Is Bis-Mercaptopropyl Dimethicone safe in cosmetics?

Mercapto (โ€“SH) functional groups are reactive with potential for thiol-mediated irritation if unreacted monomer is present; residual mercaptopropyl content must be verified and thiol odor managed. The EU classifies Bis-Mercaptopropyl Dimethicone as "permitted". Safety rating: GOOD.

Is Bis-Mercaptopropyl Dimethicone allowed in the EU?

Bis-Mercaptopropyl Dimethicone EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Bis-Mercaptopropyl Dimethicone do in cosmetics?

Bis-Mercaptopropyl Dimethicone functions as: Hair conditioning, skin conditioning (emollient), thiol-functional silicone crosslinker. It is classified as a cosmetic ingredient in our database. CAS number: Not publicly assigned in CosIng.

What is the Margin of Safety for Bis-Mercaptopropyl Dimethicone?

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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