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Moumoujus

C24-28 ALKYL METHICONE.

Valuable CAS 158061-44-0 / SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, VISCOSITY CONTROLLING

An advanced alkyl-modified silicone that bridges the gap between mineral waxes and traditional siloxanes. It provides a sophisticated, breathable moisture barrier while significantly refining the spreadability and finish of skincare and color formulations.

Summary

Emollient Viscosity controlling Skin conditioning Texture enhancer

Science

Mechanism of Action

This ingredient functions by forming a non-occlusive, water-repellent film on the skin surface. Its long-chain C24-28 alkyl groups enhance compatibility with organic oils and waxes, allowing it to regulate viscosity and reduce trans-epidermal water loss (TEWL) without the greasy residue associated with heavy emollients.

Research

Clinical Evidence

High confidence
Effective range 1–15%
Optimal

4%

Key findings

  1. 01 A 2021 safety assessment by the Cosmetic Ingredient Review (CIR) confirmed that alkyl methicones are safe for use up to 15%, showing negligible dermal absorption and minimal irritation potential.
  2. 02 The Australian Industrial Chemicals Introduction Scheme (AICIS) 2021 report validated its safety in leave-on applications at concentrations up to 4%, highlighting its low risk for systemic toxicity.

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
1%
Red flag below
0.1%

As a functional texture modifier and emollient, it is rarely used as a marketing 'hero' ingredient; however, levels below 1% may not provide the intended moisture-locking or slip-enhancing benefits.

The Formula

Formulation

Solubility
Oil
Optimal pH 3 – 11
0 7 14

Stability

Demonstrates excellent stability across a broad pH range and is highly resistant to oxidation. It is non-volatile and maintains integrity in high-temperature manufacturing processes.

Synergies

  • Organic oils
  • Waxes
  • Iron oxide pigments
  • Titanium dioxide

Conflicts

  • Highly polar water-only systems (requires emulsification)
  • Strong oxidizing agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
15%
Pregnancy
Safe
Sensitization risk Low

While safe for topical application, data is insufficient for use in airbrush or spray-based products where inhalation could occur.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A precision-engineered texture modifier that provides an elegant, non-greasy finish and essential moisture retention for all skin types.

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