Other
MYRETH-4
Safety score · 0–100
Good
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Myreth-4 is a cosmetic ingredient used in product formulations. Exercise caution due to limited available safety data.
Myreth-4 is the polyethylene glycol 4-mole ether of myristyl alcohol (tetradecanol). It is listed in CosIng with no EU restrictions. The C14 alkyl chain (myristyl) is intermediate in chain length between lauryl (C12) and cetyl (C16), offering a balance of emulsifying efficiency and skin feel. Lower ethoxylation degrees like EO4 retain more lipophilic character, making Myreth-4 effective as a co-emulsifier and conditioning agent. The ingredient has not been the subject of a dedicated SCCS opinion, but falls within the class of fatty alcohol ethoxylates that have been reviewed as safe. The ethoxylation process may introduce 1,4-dioxane as a trace impurity.
Skin benefits
- Effective co-emulsifier for stable formulations
- Provides emollient and conditioning properties
- Improves product texture and spreadability
Known concerns
- Mild-to-moderate skin or eye irritation at higher concentrations
- 1,4-dioxane trace contamination possible
- Limited standalone toxicological data
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related others
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.