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TMP LAURYL DIMETHICONE.

Questionable / EMULSION STABILISING

TMP Lauryl Dimethicone is a silicone polymer that primarily functions as an emulsion stabilizer, enhancing product integrity and preventing phase separation. On the skin, it forms a protective, vapor-permeable film, which contributes to hydration and imparts a smooth, refined texture.

Summary

Emulsion Stabilizer Dispersant Film Former Moisturizing Agent

Science

Mechanism of Action

This ingredient effectively stabilizes water-in-oil (W/O) and water-in-silicone (W/Si) emulsions, facilitating their formation and improving overall product stability. As a silicone, it creates a breathable surface film on the epidermis, which minimizes transepidermal water loss (TEWL) to support skin moisturization. Furthermore, it acts as an efficient dispersant for various powders, including mineral UV filters and cosmetic pigments.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

TMP Lauryl Dimethicone is insoluble in water but exhibits solubility in alcohol and hydroalcoholic solutions. It is highly compatible with a broad range of cosmetic ingredients, including various silicone oils, greases, electrolytes, UV filters, pigments/colors, powders, and active ingredients. It functions effectively as an emulsion stabilizer, even at low concentrations, and can be incorporated during the final manufacturing stages.

Synergies

  • Silicone oils
  • Silicone greases
  • Electrolytes
  • UV filters
  • Pigments/colors
  • Powders
  • Various active ingredients

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The CIR Expert Panel concludes that dimethicone polymers, including TMP Lauryl Dimethicone, are safe for cosmetic application due to their substantial molecular weight, which limits skin absorption. The US FDA recognizes dimethicone as a safe skin protectant, particularly at low concentrations. However, significant concerns have been raised by other bodies: EWG lists it as 'Restricted' for EWG VERIFIED products due to potential contamination by Cyclopentasiloxane and Cyclotetrasiloxane. The European Union Ecolabel program further reports that this substance is environmentally persistent, not anaerobically degradable, suspected of impairing fertility, demonstrates clear evidence of endocrine disruption in animal studies, and may cause long-lasting harmful effects to aquatic life with moderate acute toxicity.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Questionable

While offering benefits as a formulation stabilizer and skin conditioning agent, the significant environmental persistence, evidence of endocrine disruption, and contamination concerns associated with TMP Lauryl Dimethicone present substantial concerns for responsible and precise skincare formulation.

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