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TMP DIMETHICONE.

Valuable / SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

TMP Dimethicone is a sophisticated silicone polymer engineered to form a breathable, protective film on the skin's surface. This ingredient is highly effective at reducing transepidermal water loss (TEWL), thereby locking in essential moisture and imparting a distinctly smooth, silky feel to the skin.

emollient skin conditioning occlusive film former smoothing enhances spreadability

Science

As a specialized form of dimethicone, TMP Dimethicone operates by creating an imperceptible yet effective occlusive barrier on the stratum corneum. This barrier functions to significantly reduce transepidermal water loss (TEWL), ensuring optimal skin hydration. Beyond its hydrating and protective attributes against external irritants, it excels at providing a smooth, luxurious skin feel and can cosmetically diminish the appearance of fine lines and wrinkles.


Research

Medium confidence
Effective range 2–30%
Optimal

2%

Key findings

  1. 01 Recommended for leave-on formulations like moisturizers and serums for optimal cosmetic benefits.
  2. 02 Recommended for rinse-off products such as cleansers and shampoos.
  3. 03 Proposed by the FDA as a Category 1 ingredient, recognized as safe and effective for use as a skin protectant.
  4. 04 Dimethicone showed no adverse dermal reactions in short-term rabbit studies, suggesting high concentrations are well-tolerated when formulated appropriately.

Transparency

Not commonly dusted

TMP Dimethicone is a polymer primarily valued for its physical and textural contributions to formulations, such as barrier formation and feel, rather than targeted biological activity. Therefore, 'dusting' related to exaggerated claims of efficacy at minimal concentrations is not typically applicable.


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

This ingredient exhibits excellent thermal stability and resistance to most chemical substances, thereby enhancing the overall stability and shelf-life of cosmetic formulations. However, it is sensitive to degradation by strong acids.

Conflicts

  • strong acids

Safety

CIR Status
Safe as used
Max tested
85%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that Dimethicone and related siloxane polymers, which include substituted-methicone types like TMP Dimethicone, are 'safe as used' in cosmetics, provided they are formulated to be non-irritating. The FDA reinforces this safety profile by proposing its classification as Category 1 (safe and effective) for skin protectant applications up to 30%. Maximum reported cosmetic use concentration in 2019 was 85%. While a specific SCCS review for 'TMP DIMETHICONE' was not identified, its safety is generally extrapolated from the extensively reviewed Dimethicone.


Your Skin

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

Our Assessment

Valuable

TMP Dimethicone is a valuable ingredient for its ability to form a protective, hydrating barrier, improve skin texture, and enhance formulation stability with a low risk of irritation or comedogenicity, making it suitable for a wide range of skin types and product categories.


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References