What Is Potassium Trideceth-7 Carboxylate?
Potassium Trideceth-7 Carboxylate is the potassium salt form of trideceth-7 carboxylic acid, a synthetic molecule created by reacting trideceth-7, a fatty alcohol ethoxylate, with maleic or succinic anhydride then neutralizing the resulting acid with potassium hydroxide. The process yields a water-soluble ingredient that behaves like a mild soap. It first gained cosmetic attention in the late 1990s when formulators looked for gentler alternatives to traditional sulfates. Its ability to cleanse without stripping skin or hair quickly made it a favorite in sulfate-free product lines.
Today, Potassium Trideceth-7 Carboxylate shows up in shampoos, facial cleansers, micellar waters, body washes, baby washes and some makeup removers. Its balanced cleansing power lets brands market formulas as gentle yet effective.
Potassium Trideceth-7 Carboxylate’s Cosmetic Benefits/Uses
In beauty products this ingredient mainly serves one key purpose.
Cleansing: Potassium Trideceth-7 Carboxylate lowers the surface tension of water so oils, dirt and makeup can lift away easily. Because the molecule is larger and less aggressive than common sulfates it produces a soft, creamy lather that rinses clean without leaving skin tight or hair squeaky. This makes it suitable for daily use and for people who find standard cleansers too harsh.
Who Can Use Potassium Trideceth-7 Carboxylate
This gentle cleansing agent suits most skin types, including dry, normal, oily and sensitive skin, because it lifts grime without stripping natural oils. Those with extremely reactive or allergy-prone skin may still prefer a patch-tested formula that limits other potential irritants, as reactions are usually tied to the overall product rather than this ingredient alone.
Potassium Trideceth-7 Carboxylate is synthesized entirely from non-animal sources so it is compatible with vegan and vegetarian lifestyles.
Current research has not linked this ingredient to issues during pregnancy or breastfeeding. Still, this does not replace professional medical guidance so anyone who is pregnant or nursing should review their skincare routine with a qualified healthcare provider.
Unlike exfoliating acids or retinoids, Potassium Trideceth-7 Carboxylate does not create photosensitivity. Standard daytime sun protection is always wise but no special precautions are required specifically because of this cleanser.
Potential Side Effects/Adverse Reactions
Responses to topical Potassium Trideceth-7 Carboxylate vary from person to person. The effects listed below are possible but uncommon when the ingredient is formulated and used correctly.
- Mild skin irritation Slight redness, tingling or dryness can appear in very sensitive individuals, especially if the cleanser is left on the skin for an extended period
- Eye stinging Contact with the eyes may cause temporary tearing or discomfort that resolves once the product is rinsed away
- Contact dermatitis Rare allergic reactions can lead to itching, swelling or rash that persists beyond rinsing
- Scalp dryness Overwashing with high-concentration shampoos may leave the scalp feeling tight or flaky
If any of these reactions occur stop using the product and seek advice from a healthcare professional.
Comedogenic Rating
Rating: 0 / 5
Potassium Trideceth-7 Carboxylate is a water-soluble surfactant that rinses off completely, so it does not sit inside pores or leave behind a film that could trap oil and debris. Because it is non-occlusive and free of fatty components it is considered non-comedogenic and is generally suitable for people prone to acne or breakouts.
Keep in mind the finished product’s overall formula can influence pore-clogging potential. Added heavy oils, butters or silicones might still raise the comedogenic profile even though this particular ingredient is safe on its own.
Summary
Potassium Trideceth-7 Carboxylate functions primarily as a cleanser, lowering water’s surface tension so dirt, oil and makeup can lift away with a soft, creamy lather. It achieves this through its balanced anionic structure, providing effective cleansing without the harshness of traditional sulfates.
While not a household name, it is steadily found in sulfate-free shampoos, facial cleansers, body washes and micellar waters, especially in products marketed for sensitive or daily use.
Current research and long-term use show it to be low risk for irritation or breakouts when formulated correctly. Still, it is always wise to patch test a new product that contains it to ensure your skin responds well.