PEG/PPG-17/18 Dimethicone

INCI: PEG/PPG-17/18 DIMETHICONE

CAS Number
68937-55-3 (Dimethylsiloxane, ethoxylated/propoxylated)
Function
Emulsifier (O/W and W/O), hair conditioning agent, skin conditioning agent
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status restricted
EU Max Conc. 0.1%
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes CIR-reviewed under Polyoxyalkylene Siloxane Copolymers โ€” safe as used. Reported up to 14% in perfumes, 13% in hair products.

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

D4/D5 cyclic siloxane impurities typically <0.1%; 1,4-dioxane from ethoxylation; Pt catalyst residues <5 ppm.

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Concern Level: Low

Regulatory Flags

peg-ingredient

Frequently Asked Questions

Is PEG/PPG-17/18 Dimethicone safe in cosmetics?

D4/D5 cyclic siloxane impurities typically <0.1%; 1,4-dioxane from ethoxylation; Pt catalyst residues <5 ppm. The EU classifies PEG/PPG-17/18 Dimethicone as "restricted". Safety rating: GOOD.

Is PEG/PPG-17/18 Dimethicone allowed in the EU?

PEG/PPG-17/18 Dimethicone EU regulatory status: restricted. Maximum allowed concentration: 0.1%. This is based on EU Regulation 1223/2009 and its amendments.

What does PEG/PPG-17/18 Dimethicone do in cosmetics?

PEG/PPG-17/18 Dimethicone functions as: Emulsifier (O/W and W/O), hair conditioning agent, skin conditioning agent. It is classified as a cosmetic ingredient in our database. CAS number: 68937-55-3 (Dimethylsiloxane, ethoxylated/propoxylated).

What is the Margin of Safety for PEG/PPG-17/18 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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