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ARACHIDETH-37.

Valuable CAS 26636-39-5 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A high-performance non-ionic emulsifier and surfactant derived from arachidyl alcohol. It is primarily utilized in precision skincare to create stable, elegant oil-in-water emulsions with a lightweight feel.

emulsifying surfactant cleansing stabilizing

Science

Arachideth-37 functions as a bridge between oil and water phases, utilizing a high Hydrophilic-Lipophilic Balance (HLB) of approximately 16.9. By significantly reducing surface tension, it ensures that active ingredients remain uniformly distributed throughout a formula, preventing separation and enhancing application consistency.


Research

High confidence
Effective range 0.1–5%
Optimal

2.5%

Key findings

  1. 01 The Cosmetic Ingredient Review (CIR) evaluated Arachideth-37 within the Alkyl PEG Ethers group, confirming its safety profile and lack of systemic toxicity in repeated dose clinical evaluations.

Transparency

Not commonly dusted
Min. effective
0.1%
Red flag below
0.05%

As a functional emulsifier rather than a primary active, it is rarely 'dusted' for marketing claims; however, concentrations below 0.1% may indicate insufficient levels for formula stabilization in complex emulsions.


The Formula

Solubility
Water
Optimal pH 3 – 11
0 7 14

Stability

Highly resilient due to stable ether linkages. It maintains structural integrity across a wide pH spectrum and is notably more temperature-resistant than many ionic alternatives.

Synergies

  • Low HLB co-emulsifiers
  • Lipophilic actives
  • Mineral UV filters

Conflicts

  • High electrolyte concentrations
  • Strong oxidizing agents

Safety

CIR Status
Safe as used
Max tested
5%
Pregnancy
Safe
Sensitization risk Low

Safe for cosmetic use when purified to remove ethoxylation byproducts like 1,4-dioxane and ethylene oxide. It is non-irritating when formulated correctly.


Your Skin

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

Our Assessment

Valuable

A reliable and chemically stable emulsifier essential for maintaining the structural integrity of high-performance topical delivery systems.


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