Tetramethyl Hexaphenyl Tetrasiloxane

What is Tetramethyl Hexaphenyl Tetrasiloxane?

Tetramethyl Hexaphenyl Tetrasiloxane is a synthetic organosilicon compound from the siloxane class, consisting of a tetrasiloxane chain—four silicon-oxygen linkages—with four methyl groups and six phenyl groups attached. These substituents give it distinctive sensory traits. In cosmetics, it falls under emollients and conditioning agents, commonly found in foundations, primers, serums, and creams. It works by rapidly spreading across the skin to create a thin, breathable film that boosts slip and even application. The phenyl modifications yield a powdery, velvety touch distinct from oily emollients, while its low viscosity enhances blendability and product elegance without heaviness. This makes it valuable for lightweight, long-wear formulas that prioritize comfort and aesthetics.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.

Benefits

Imparts a smooth, velvety texture during application.

Supports skin softness and flexibility through conditioning.

Offers lightweight emolliency without pore-clogging potential.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
People desiring a dry-touch finish in daily skincare or makeup.
Individuals sensitive to silicone compounds, though rare.
Those with normal to combination skin types for non-greasy hydration.
People preferring fully natural or silicone-free formulations.
Users prioritizing product spreadability and comfortable wear.
Those with personal experience of reactions to similar silicones.

Safety Notes

  • Considered low hazard with excellent skin compatibility.
  • Non-comedogenic and suitable for broad cosmetic use.

Frequently Asked Questions about Tetramethyl Hexaphenyl Tetrasiloxane

What role does it play in products?

Acts as a skin conditioning agent to enhance smoothness and provide a velvety feel.

Is it irritating to skin?

Evidence points to low irritation potential for most users.

Safe for daily use?

Rated very low hazard and compatible in cosmetic concentrations.