What Is Trioxaundecanedioic Acid?
Trioxaundecanedioic Acid is a lab made ingredient classified as a dicarboxylic acid. Chemically it can be described as acetic acid, 2,2′-[oxybis(2,1-ethanediyloxy)]bis-, which simply means it has two acid groups linked by short chains of carbon and oxygen atoms. It is not taken from plants or animals but is produced through controlled chemical reactions that connect smaller building blocks under heat and catalysts, followed by purification to remove any leftover reactants. The result is a fine white powder that dissolves easily in water and many water-based cosmetic mixes.
The beauty industry began exploring this acid in the early 2000s while searching for gentle moisture boosting agents that would not feel sticky. Its balanced structure lets it hold water without drawing too much oil from the skin, making it attractive to formulators. Nowadays you can spot Trioxaundecanedioic Acid in light face and body lotions, sheet masks, hydrating serums, after-sun gels and certain anti-age products where steady moisture is key.
Trioxaundecanedioic Acid’s Cosmetic Benefits/Uses
In skincare formulas this ingredient is valued for one main role.
As a humectant it pulls water from the environment and the deeper skin layers to the surface, helping to keep skin hydrated, soft and smooth. This added moisture can reduce the look of fine lines, improve flexibility and support a healthy barrier, all without leaving a heavy film.
Who Can Use Trioxaundecanedioic Acid
This humectant is generally well suited for all skin types, including oily, dry, combination and normal skin. Because it is lightweight and water loving it hydrates without clogging pores or leaving a greasy feel. Sensitive skin usually tolerates it too since it has a mild profile and a neutral pH, though very reactive skin should still proceed with care when trying anything new.
Vegans and vegetarians can feel comfortable using products with Trioxaundecanedioic Acid. The ingredient is made entirely in the lab from non-animal sources and no animal by-products are used in its manufacture.
No data point to any risk for pregnant or breastfeeding women when this ingredient is applied to the skin in cosmetic amounts. That said this is not medical advice and anyone who is expecting or nursing should check with a healthcare professional before adding new products to a routine.
The acid does not make skin more sensitive to sunlight so it is not considered photosensitising. Daily sunscreen is still wise for overall skin health.
Potential Side Effects/Adverse Reactions
Responses to Trioxaundecanedioic Acid vary from person to person. The effects listed below are possible but not likely for most users when a product is well formulated and used as directed.
- Mild redness or warmth shortly after application
- Itching or light stinging on very sensitive skin
- Rare contact dermatitis in individuals with known acid sensitivities
- Temporary tightness if the product is allowed to dry without sealing with a moisturizer
If any of these effects occur stop use and seek guidance from a healthcare professional if symptoms do not calm quickly.
Comedogenic Rating
Rating: 0 out of 5. Trioxaundecanedioic Acid is highly water soluble, has a small molecular size and leaves no oily residue, all of which mean it does not block pores. Its role as a humectant focuses on attracting moisture rather than forming occlusive films, so it poses virtually no risk of triggering comedones.
Because of this non-clogging nature it is generally suitable for people prone to acne or frequent breakouts.
Formulas that combine this acid with heavy oils or waxes could still cause congestion, so always consider the full ingredient list.
Summary
Trioxaundecanedioic Acid is used mainly as a humectant that binds water to the skin surface, helping keep it hydrated, supple and comfortable without heaviness. Its balanced dicarboxylic structure lets it hold moisture efficiently while maintaining a neutral feel.
Although not as famous as hyaluronic acid or glycerin it is quietly showing up in more lotions, masks and gels because formulators appreciate its light touch and good stability.
Current data show it is low risk for irritation, safe for all skin types and vegan friendly. Still, skin is individual, so performing a small patch test when trying any new product containing this ingredient is a smart precaution.