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SODIUM PEG-8 PHOSPHATE.

Valuable CAS 9088-10-2 / SKIN PROTECTING

SODIUM PEG-8 PHOSPHATE is a versatile polyethylene glycol (PEG) derivative primarily functioning as a humectant, drawing and retaining moisture to enhance skin hydration. It also acts as an effective solvent, facilitating the enhanced penetration and even distribution of other active ingredients within cosmetic formulations.

Summary

humectant solvent potential surfactant potential emulsifier potential cleansing agent potential skin conditioner

Science

Mechanism of Action

As a polyethylene glycol (PEG) derivative, SODIUM PEG-8 PHOSPHATE primarily binds moisture to the skin, providing hydrating benefits through its humectant properties. Concurrently, it serves as a solvent, improving the efficacy of other cosmetic components by enhancing their solubility and facilitating more efficient penetration into the skin. The unique PEG structure combined with its phosphate group may additionally contribute to its properties as a surfactant, emulsifier, cleansing agent, or skin conditioner.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH 4.5 – 8.5
0 7 14

Stability

SODIUM PEG-8 PHOSPHATE exhibits stability across a broad pH range, optimally between 4.5 and 8.5, as indicated by its base structure and related compounds. It is readily soluble in water and a variety of organic solvents. However, it is immiscible with alkanes, paraffins, waxes, and ethers.

Conflicts

  • alkanes
  • paraffins
  • waxes
  • ethers

Safety

Safety Profile

CIR Status
Safe with restrictions
Sensitization risk Moderate

The CIR Expert Panel considers PEGs and their derivatives, including SODIUM PEG-8 PHOSPHATE, safe for cosmetic use under current conditions and concentrations, provided formulations are non-irritating. Manufacturers must ensure the removal of potential toxic impurities like ethylene oxide and 1,4-dioxane during production. This ingredient is specifically recommended for topical application on healthy skin and should be avoided on broken or sensitive skin, a restriction also noted by the FDA for PEG-8.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
No Oily
No Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

SODIUM PEG-8 PHOSPHATE is a valuable ingredient for formulations, effectively enhancing hydration as a humectant and improving active ingredient delivery as a solvent, with safety contingent on application to healthy skin and meticulous purity standards.

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