What Is Myreth-10?
Myreth-10 is the cosmetic name for poly(oxy-1,2-ethanediyl) .alpha.-tetradecyl-.omega.-hydroxy-, a synthetic ingredient built from ethylene oxide units attached to a fourteen-carbon fatty alcohol. In simple terms, it is a fatty alcohol combined with small segments of ethylene glycol that give it water-loving properties. This blend of oil-like and water-loving parts lets Myreth-10 bring oil and water together in smooth, stable mixtures.
The ingredient traces its roots to the mid-20th century when formulators began adding polyethylene glycol chains to natural fatty alcohols to improve the feel and stability of creams and lotions. As production of ethoxylated surfactants grew, Myreth-type materials found a niche in personal care because they are mild and versatile.
Manufacturing starts with a plant-derived or synthetic myristyl alcohol. This fatty alcohol reacts with controlled amounts of ethylene oxide in a pressurized vessel. Each round of ethoxylation adds one unit of ethylene oxide, and after ten additions the process is stopped, creating Myreth-10. The finished ingredient is purified, checked for residual impurities then shipped as a clear to pale yellow liquid or soft paste.
You will most often spot Myreth-10 in moisturizers, cleansing milks, facial masks, makeup removers, sunscreens, serums and lightweight hair conditioners. Its balanced structure helps these products feel light yet creamy while keeping the formula from separating during storage.
Myreth-10’s Cosmetic Benefits/Uses
In formulas Myreth-10 serves a single but essential role as an emulsifying agent. It helps oils and water blend into a uniform emulsion so creams and lotions stay smooth, feel pleasant during application and deliver their active ingredients evenly across the skin or hair.
Who Can Use Myreth-10
Because Myreth-10 is mild and mainly acts as an emulsifier, it suits most skin types including normal, dry, combination and oily skin. Those with very sensitive or compromised skin should still check the full ingredient list of a product, but Myreth-10 on its own is rarely a trigger for irritation.
The ingredient is synthetically produced from fatty alcohol that can be sourced from plants or petroleum. When plant-derived it is appropriate for vegans and vegetarians, and many suppliers now specify a coconut or palm origin. If the product label or manufacturer confirms plant sourcing, animal-free users can feel comfortable.
No data link Myreth-10 to hormonal activity, so it is generally considered safe for use during pregnancy and breastfeeding. This is not medical advice; anyone who is pregnant or nursing should review any skincare product with a qualified healthcare professional before use.
Myreth-10 does not increase photosensitivity, and it does not interfere with sunscreens or other active ingredients. It is also fragrance-free and has no natural color, making it a good fit for minimalist or fragrance-sensitive routines.
Potential Side Effects/Adverse Reactions
Reactions to topical Myreth-10 differ from person to person. The issues listed below are possible but uncommon when the ingredient is used at the low levels typical in finished cosmetics.
- Mild stinging or redness on very sensitive skin
- Contact dermatitis in individuals allergic to ethoxylated compounds
- Eye irritation if a product containing high levels of Myreth-10 accidentally gets into the eyes
- Rare contamination concerns if the raw material is not properly purified
If any discomfort or persistent reaction occurs stop using the product and consult a healthcare professional.
Comedogenic Rating
Rating: 1 / 5
Myreth-10 is classed as a low-clogging ingredient because the ethylene oxide units make it partly water-soluble, so it does not linger in pores the way heavier plain fatty alcohols can. Formulas only use small amounts of it to keep oil and water mixed, further lowering any chance of it building up on the skin.
This means most people who are prone to acne or breakouts can use products that contain Myreth-10 without added concern. However if the same product also includes rich oils or butters, the overall likelihood of clogging may rise, so always look at the full ingredient list.
Summary
Myreth-10’s main job is to act as an emulsifier, pulling together oil-based and water-based ingredients so creams, lotions and cleansers stay smooth and stable. Its split personality of an oil-friendly tail and a water-loving head lets it sit at the boundary between the two phases and hold them in a fine, even dispersion.
While not a superstar name like hyaluronic acid or niacinamide, Myreth-10 is quietly popular with formulators because it is mild, easy to work with and compatible with many actives. Consumers usually do not notice it yet benefit from the silky texture it helps create.
Current safety data shows a low risk of irritation or clogging when used at normal cosmetic levels. Still, everyone’s skin is different so it is wise to patch test any new product that lists Myreth-10 just to be sure it agrees with your skin.