Get a Free 5ml Mini Now Free 5ml Mini With Every Order of The Mantle
Moumoujus

METHYL HYDROXYETHYLCELLULOSE.

Valuable CAS 9032-42-2 / LIGHT STABILIZER, VISCOSITY CONTROLLING

Methyl Hydroxyethylcellulose (MHEC) is a cellulose-derived polymer primarily utilized in skincare to enhance product texture and stability. It functions as a rheology modifier, thickening formulations while also offering mild film-forming and moisturizing benefits to the skin.

Summary

Rheology Modifier Thickening Agent Film-forming Water-retention Protective Barrier Stabilizing Viscosity Controlling

Science

Mechanism of Action

MHEC acts as a rheology modifier, increasing product viscosity to achieve desired thickness and smooth consistency, which can minimize the need for potentially irritating alternative agents. On the skin, it forms a breathable, hydrophilic film that helps to attract and retain moisture, thereby reducing trans-epidermal water loss and forming a protective barrier against environmental aggressors. This film also facilitates the controlled release of active ingredients.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 8
0 7 14

Stability

MHEC demonstrates optimal stability within a pH range of 5.0 to 8.0. Its non-ionic structure ensures broad compatibility with a variety of co-ingredients, including many surfactants, and it exhibits high tolerance for dissolved electrolytes and salts. While similar cellulose polymers like Hydroxyethylcellulose (HEC) may tolerate a broader pH range (2-12), prolonged exposure to extreme pH can lead to hydrolysis and a reduction in viscosity.

Synergies

  • Compatible with most co-ingredients, including various surfactants, due to its non-ionic nature.
  • Tolerates dissolved electrolytes and salts effectively, enhancing formulation versatility.

Conflicts

  • General caution for potential chemical or physical incompatibilities with other additives.
  • When formulating with retinoids or highly acidic ingredients, especially for sensitive skin, it is recommended to keep MHEC concentration at or below 0.5% and conduct irritation tests, based on best practices for similar cellulose derivatives.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
10%
Sensitization risk Low

The CIR Expert Panel has determined MHEC and related cellulose polymers to be safe for cosmetic use. Specifically, its close derivative, Hydroxyethylcellulose, has been found non-irritating, non-sensitizing, and non-toxic at typical cosmetic concentrations. The FDA has approved related cellulose ethers for cosmetic applications without restriction and as indirect food additives. MHEC complies with EU Cosmetics Regulation (EC) No 1223/2009, with safety confirmed up to 10% based on low oral, dermal, and inhalation toxicity.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Methyl Hydroxyethylcellulose is a valuable ingredient, optimizing product texture and stability while offering mild moisturizing and protective benefits, suitable for all skin types due to its low irritancy and comedogenicity.

Related

Similar Ingredients

Finding similar ingredients…