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Moumoujus

C5-8 ALKYL ACRYLATE.

Valuable / NOT REPORTED

A high-performance amphiphilic polymer designed to stabilize sophisticated emulsions while providing a breathable, protective barrier on the skin. It bridges the gap between water and oil phases, ensuring a smooth application and long-lasting product integrity.

Summary

emulsion stabilising film forming viscosity controlling

Science

Mechanism of Action

This ingredient utilizes a dual-action structure: a polyacrylate backbone that swells in water to provide viscosity and a series of C5-8 alkyl side chains that anchor into oil droplets. This 'bridging' effect prevents oil and water from separating, while the resulting film locks in moisture and keeps active ingredients or pigments evenly distributed on the skin surface.

Research

Clinical Evidence

High confidence
Effective range 2–30%
Optimal

25%

Key findings

  1. 01 A 25% aqueous dilution was subjected to Human Repeated Insult Patch Testing (HRIPT) and demonstrated zero evidence of sensitization or irritation across 47 participants.
  2. 02 Clinical evaluations of a 30% solids concentration confirmed the polymer is both non-irritating and non-sensitizing.
  3. 03 Safety assessments of related cross-linked acrylates at 2% concentration showed no adverse dermal reactions.

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.5%
Red flag below
0.1%

Because this ingredient is primarily used for structural stability and film formation, it is rarely 'dusted' for marketing purposes. It is typically used at functional levels to achieve the desired texture and water resistance.

The Formula

Formulation

Solubility
Water
Optimal pH 6 – 8.5
0 7 14

Stability

The polymer must be neutralized with a base like Sodium Hydroxide or Aminomethyl Propanol to reach full clarity and viscosity; it performs optimally between pH 6.5 and 7.5.

Synergies

  • Hydrophobic active ingredients
  • Cosmetic pigments
  • Sunscreen filters

Conflicts

  • High electrolyte concentrations
  • Sodium Chloride
  • Cationic surfactants
  • Cationic polymers (Polyquaternium-7/10)
  • Strongly acidic environments below pH 5.5

Safety

Safety Profile

CIR Status
Safe as used
Max tested
25%
Pregnancy
Safe
Sensitization risk Low

The CIR Expert Panel considers this part of a safe class of 126 acrylates copolymers. While used up to 98.6% in nail products, it is limited to 25% in leave-on dermal skincare to maintain non-irritating profiles.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A sophisticated stabilizer and film-former that provides exceptional product texture and water resistance with a high safety profile for all skin types.

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References

Sources