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TEA-DIMETHICONE PEG-7 PHOSPHATE.

Optional CAS 175893-65-9 / CLEANSING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

TEA-DIMETHICONE PEG-7 PHOSPHATE is a versatile silicone-based polymer functioning as both a cleansing and emulsifying agent. It forms a protective film on the skin, assisting in the blend of immiscible liquids and reducing transepidermal water loss. While the dimethicone portion is generally considered safe, the Triethanolamine (TEA) component is noted for its potential pro-inflammatory and toxic properties.

Summary

Cleansing Agent Emulsifying Agent Skin Barrier Agent Film Former Moisturizer Texture Enhancer

Science

Mechanism of Action

This ingredient functions dually as a cleansing agent and an emulsifier. As an emulsifier, it establishes a surface film on the skin, effectively reducing surface tension and facilitating the stable mixture of normally immiscible liquids. The dimethicone, a silicone polymer, creates a hydrophobic barrier on the skin's outermost layer (stratum corneum), which mitigates the entry of external substances and significantly decreases transepidermal water loss. This barrier also imparts a desirable shine and a smooth, slippery feel to the skin.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

No specific optimal pH range for the stability of TEA-DIMETHICONE PEG-7 PHOSPHATE has been identified. However, a functionally similar ingredient, PEG-8 dimethicone, maintains stability within a pH range of 5.5–8.5 in formulations.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) concluded that Dimethicone PEG-7 Phosphate is safe under current practices of use and concentration, with its large molecular weight suggesting unlikely skin absorption. The U.S. FDA recognizes dimethicone as a safe skin protector at low concentrations. However, in 2019, the CIR Expert Panel re-opened the safety assessment for dimethicone and related polymers due to increased use, particularly in inhalable products, seeking further data on particle size and inhalation toxicity. It is important to note that the Triethanolamine (TEA) component is considered a potentially toxic and pro-inflammatory compound.

Your Skin

Skin Compatibility

No Normal
Yes Dry
No Oily
No Sensitive
Irritancy Moderate
Comedogenicity Low

Our Assessment

Verdict

Optional

While offering valuable emulsifying and skin barrier properties, the Triethanolamine component presents a moderate irritancy risk, making its inclusion optional for precision skincare formulations.

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