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Moumoujus

METHOXY PEG-7.

Valuable CAS 9004-74-4 / HUMECTANT, SOLVENT

METHOXY PEG-7 is a polyether compound functioning as a humectant to attract and retain moisture within cosmetic formulations and on the skin. It also serves as a solvent, aiding in the dissolution of other ingredients, and enhances the skin's absorption capabilities for co-applied active components.

Summary

humectant solvent solubilizer absorption enhancer

Science

Mechanism of Action

As a humectant, METHOXY PEG-7 actively binds and retains water molecules, contributing to product stability and skin hydration. Its solvent properties facilitate the uniform distribution and integration of various substances within a formula. Furthermore, this ingredient acts as a solubilizer, improving the overall permeability of the skin to other cosmetic additives, thereby potentially enhancing their efficacy. It can also function as a substitute for glycerol in lotion formulations.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

No specific data regarding 'dusting' behavior or associated concerns for METHOXY PEG-7 were found in the research.

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 7
0 7 14

Stability

METHOXY PEG-7 is a linear, water-soluble polymer stable within a pH range of 5 to 7, as indicated by a 5% w/w solution. It exhibits solubility in water, ethanol, and various highly polar organic solvents.

Synergies

  • Enhances the absorption and delivery of other active cosmetic ingredients due to its solubilizing properties.

Conflicts

  • Should not be applied to compromised or damaged skin, as this may increase the potential for systemic toxicity and sensitization.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) has deemed METHOXY PEG-7 safe for use in cosmetics under current practices. However, manufacturers are obligated to ensure the rigorous removal of impurities such as ethylene oxide and 1,4-dioxane, which are potential by-products of the ethoxylation process. While generally safe for intact skin, application to damaged skin is contraindicated due to an elevated risk of systemic toxicity and potential sensitization. Polyethylene glycol, the broader class to which this ingredient belongs, holds approval from the U.S. FDA as a food additive.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

METHOXY PEG-7 is a valuable formulation ingredient due to its humectant and solvent properties, coupled with its ability to enhance the absorption of other active components, particularly beneficial for dry skin types.

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