What Is Trisodium Dicarboxymethyl Alaninate?
Trisodium Dicarboxymethyl Alaninate is a salt made from the amino acid alanine that has been chemically linked to two carboxymethyl groups, then neutralized with three sodium ions. This link turns the gentle, naturally occurring alanine into a smart helper that grabs onto metal ions. The ingredient was first explored in the 1980s when chemists looked for safer options than older metal binders such as EDTA. Today it is made in a controlled lab setting by reacting alanine with chloroacetic acid, adjusting the pH with sodium hydroxide and then purifying the result. The finished powder dissolves easily in water and is stable across a wide pH range, which makes it attractive to cosmetic chemists. You will most often see it in water based products like facial cleansers, toners, serums, sheet masks, moisturizers, shampoos, conditioners and anti aging formulas where keeping the product fresh and active is key.
Trisodium Dicarboxymethyl Alaninate’s Cosmetic Benefits/Uses
This ingredient is prized because it works as a chelating agent.
By binding stray metal ions such as iron, copper and calcium, it stops those metals from breaking down delicate actives or causing the product to discolor. That action helps formulas stay clear, keeps preservatives working better and allows fragrances or botanical extracts to last longer on the shelf. In short it protects both the performance and look of a cosmetic product so the user gets the same result from the first pump to the last.
Who Can Use Trisodium Dicarboxymethyl Alaninate
This chelating agent is considered gentle enough for all skin types including oily, dry, combination and sensitive skin because it is used at very low levels and does not alter the skin’s natural balance. There are no known concerns for people with acne-prone skin or common sensitivities.
The ingredient is made entirely from plant-derived or synthetic sources and contains no animal by-products so it is suitable for vegans and vegetarians.
Current research has not flagged any specific issues for pregnant or breastfeeding women when using products that contain Trisodium Dicarboxymethyl Alaninate. That said this is not medical advice and anyone who is pregnant or nursing should run any skincare product past a qualified doctor just to be safe.
The ingredient does not cause photosensitivity so it will not make the skin more prone to sunburn. It also plays well with other common cosmetic ingredients and does not interfere with actives such as vitamin C or retinol.
Potential Side Effects/Adverse Reactions
Side effects and reactions to the topical use of Trisodium Dicarboxymethyl Alaninate can vary from person to person. The points below list potential issues yet these are uncommon when the ingredient is correctly formulated.
- Mild skin irritation – Very rare and usually limited to those with an existing sensitivity to multiple ingredients
- Eye stinging if product gets into the eyes – Flush with plenty of water if this occurs
- Allergic contact dermatitis – Extremely rare but possible for individuals with a specific allergy to the molecule or to similar chelating agents
If any unexpected reaction develops stop using the product and seek medical advice.
Comedogenic Rating
Rating: 0
Trisodium Dicarboxymethyl Alaninate is a small, highly water soluble molecule that leaves no oily residue on the skin and is typically used at fractions of a percent. Because it does not form films or clog pores the likelihood of it blocking follicles is virtually zero.
Suitable for acne prone or breakout prone skin.
No special storage or layering concerns affect its comedogenic potential. It performs the same in rinsed or leave-on products.
Summary
Trisodium Dicarboxymethyl Alaninate acts as a chelating agent, meaning it grabs metal ions like iron, copper and calcium so they cannot spoil delicate ingredients or discolor a formula. By keeping metals tied up it helps preservatives stay potent and active ingredients remain stable from the first use to the last.
The ingredient is not as famous as long-standing chelators such as EDTA, yet it is gaining steady attention among formulators looking for mild, eco-minded options.
Safety data show a low risk of irritation or allergies at the levels seen in cosmetics, making it a reliable choice for most users. Even so, trying any new product on a small patch of skin first is always a wise move.