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Moumoujus

LANETH-9 ACETATE.

Questionable CAS 65071-98-9 / HAIR CONDITIONING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

Laneth-9 Acetate is a polyoxyethylene ether derived from lanolin alcohol, serving as a multifunctional ingredient in cosmetic formulations. It primarily functions as an emollient and nonionic emulsifier, contributing to moisture retention and product stability.

Summary

Emollient Emulsifier (nonionic) Wetting Agent Foam Booster Stabilizer Hair Conditioner Solubilizer Cleansing Agent Dispersing Agent Plasticizer

Science

Mechanism of Action

This ingredient operates by forming an occlusive film on the skin, hair, and nails, thereby reducing transepidermal water loss and enhancing hydration. As a nonionic emulsifier, it aids in blending immiscible phases, while its wetting and dispersing properties improve product spreadability and homogeneity. It also acts as a foam booster and can modulate the viscosity of gel-based systems.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Laneth-9 Acetate exhibits relative stability across typical cosmetic pH ranges. However, its unsaturated components are susceptible to autoxidation and photolysis, which can be mitigated by the inclusion of antioxidants like butylated hydroxytoluene (BHT) or α-tocopherol. Trace amounts of 1,4-dioxane, a byproduct of the ethoxylation process, may be present but are controllable through purification steps.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Unknown

The CIR Expert Panel has consistently affirmed the safety of Laneth-9 Acetate for topical application, with reaffirmations in 2002 and 2023. Notwithstanding these conclusions, 2022 concentration of use data and 2023 FDA VCRP data indicate no reported current uses for this ingredient in cosmetic products.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Questionable

While deemed safe by the CIR Expert Panel, the notable absence of reported current uses in cosmetic formulations suggests its practical relevance or efficacy for precision skincare may be limited, warranting further investigation into modern applications.

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