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Moumoujus

ACETYLATED CASTOR OIL.

Valuable CAS 84929-62-4 / SKIN CONDITIONING - OCCLUSIVE

Acetylated Castor Oil is an occlusive emollient and skin-conditioning agent, known for its ability to form a moisture-trapping barrier on the skin. It improves skin suppleness and smoothness by integrating into the lipid matrix.

Summary

emollient occlusive skin conditioning

Science

Mechanism of Action

This ingredient acts as an occlusive emollient, forming a hydrophobic barrier on the stratum corneum to reduce Transepidermal Water Loss (TEWL). Acetylation increases its compatibility with skin lipids, allowing it to soften and smooth the surface.

Research

Clinical Evidence

Medium confidence
Effective range 1–10%
Optimal

N/A

Key findings

  1. 01 A CIR Expert Panel assessment found related acetylated lanolin derivatives non-irritating and safe for topical use up to 7.5%.
  2. 02 Studies showed Acetylated Castor Oil improves film flexibility and reduces moisture permeability, indicating strong occlusive properties.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH 4.5 – 7
0 7 14

Stability

Highly stable under typical cosmetic conditions, it resists oxidation better than raw castor oil due to acetylated hydroxyl groups. Avoid temperatures above 250°C to prevent decomposition.

Conflicts

  • Strong oxidizing agents
  • Highly alkaline conditions
  • Anionic surfactants (at very high concentrations)

Safety

Safety Profile

CIR Status
Safe as used
Max tested
100%
Sensitization risk Low

The CIR Expert Panel considers Acetylated Castor Oil safe as used in current cosmetic practices. While safe up to 100%, typical emollient formulations use 1-10%.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
No Oily
Yes Sensitive
Irritancy Low
Comedogenicity Moderate

Our Assessment

Verdict

Valuable

A valuable occlusive emollient, Acetylated Castor Oil effectively locks in moisture and conditions the skin, with a low irritancy profile, suitable for most skin types.

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