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Moumoujus

2-METHYL-4-HYDROXYPYRROLIDINE.

Valuable CAS 94134-94-8 / SKIN CONDITIONING - MISCELLANEOUS

A biomimetic pyrrolidine derivative that structurally resembles 4-hydroxyproline, an essential amino acid building block of collagen. This skin-conditioning compound acts as both a humectant and soothing agent, helping to maintain skin elasticity while providing relief from irritation. Its unique molecular structure allows it to function as an endogenous metabolite mimic within the dermal collagen matrix.

Summary

skin conditioning soothing humectant anti-irritant

Science

Mechanism of Action

Functions by mimicking natural hydroxyproline found in collagen, serving dual roles as a humectant to attract moisture and a biomimetic building block that supports skin barrier function. The pyrrolidine ring structure enables it to integrate with existing collagen pathways while providing anti-irritant properties through modulation of inflammatory responses.

Research

Clinical Evidence

Medium confidence
Effective range 0.1–5%
Optimal

2.5%

Key findings

  1. 01 Demonstrated efficacy as skin-conditioning and soothing agent in patented formulations, with particular effectiveness in relieving skin and scalp discomfort

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.05%
Red flag below
0.01%

Given its specialized nature and patent-protected applications, dusting is unlikely as meaningful concentrations (0.1%+) are required for efficacy

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 8
0 7 14

Stability

Maintains stability in aqueous solutions within physiological pH ranges. Commonly formulated as hydrochloride salt for enhanced water solubility and topical stability. Requires cool, dark storage to prevent pyrrolidine ring degradation.

Synergies

  • Hyaluronic acid
  • Ceramides
  • Peptides

Conflicts

  • Strong oxidizing agents
  • Strong acids

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
5%
Pregnancy
Safe
Sensitization risk Low

Listed in INCI dictionary. Pure substance classified as skin/eye irritant (H315, H319) under GHS, but considered safe and non-irritating at cosmetic use concentrations.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A scientifically-sound biomimetic ingredient offering genuine skin-conditioning and soothing benefits with excellent compatibility across all skin types.

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