What Is Sodium Caproamphopropionate?
Sodium Caproamphopropionate is a synthetic surfactant derived from capric acid, a fatty acid typically sourced from coconut or palm kernel oil, that has been reacted with amino acids and neutralized with sodium to form a water-soluble salt. Its official chemical name, decanamide N-[2-[N-(2-hydroxyethyl)-N-(2-carboxyethyl)amino]ethyl]- monosodium salt, hints at its balanced mix of oil-loving and water-loving parts, which lets it interact easily with both skin oils and rinse water.
The ingredient was introduced to personal care labs in the late 1970s when formulators were searching for milder alternatives to traditional sulfates. By tweaking the fatty acid chain length and adding amphoteric groups, chemists created Sodium Caproamphopropionate as a gentler yet effective cleanser that also produces a satisfying lather.
Manufacturing starts with natural fatty acids that are converted into amides, then reacted with sodium monochloroacetate and finally neutralized. The result is a clear to pale-yellow liquid that blends well with water-based formulations and remains stable across a wide pH range.
You will most often spot Sodium Caproamphopropionate in daily facial cleansers, micellar waters, body washes, sulfate-free shampoos, bubble baths, kids’ bath products, shaving foams, and gentle baby wipes. Its mild profile also makes it a popular secondary surfactant in cream cleansers, clay masks, and exfoliating scrubs where skin comfort is a priority.
Sodium Caproamphopropionate’s Cosmetic Benefits/Uses
Formulators choose Sodium Caproamphopropionate for several practical reasons that improve both product performance and user experience.
- Cleansing: Lifts away dirt, excess oil and makeup without stripping the skin’s natural barrier, making it ideal for sensitive or daily use products
- Foaming: Generates a rich, dense lather that consumers associate with effective cleansing even at lower surfactant levels
- Hair Conditioning: Leaves a smooth feel on hair strands helping to reduce static and improve manageability in shampoos and 2-in-1 formulas
- Foam Boosting: Enhances and stabilizes foam created by other surfactants allowing formulators to reduce harsher cleansing agents while keeping the product enjoyable to use
Who Can Use Sodium Caproamphopropionate
This ingredient is considered gentle enough for all skin types, including dry, oily, combination and sensitive skin. Because it cleans without stripping the skin’s natural oils it tends to leave even reactive complexions feeling comfortable rather than tight or itchy.
Sodium Caproamphopropionate is synthesized from plant based fatty acids so it is suitable for vegans and vegetarians. No animal by-products are used in its standard manufacturing process.
Current safety data show no known risks for pregnant or breastfeeding women when the ingredient is used in rinse-off or leave-on personal care products. That said this is not medical advice. Anyone who is expecting or nursing should review any new skincare product with a qualified health professional just to be safe.
The ingredient does not make skin more sensitive to sunlight and it does not interfere with sunscreens, self-tanners or other sun care items. It is also color-safe for hair and will not strip dyed strands.
Potential Side Effects/Adverse Reactions
Side effects from the topical use of Sodium Caproamphopropionate can vary from person to person. The points below list potential issues but they are not common. When used at normal levels in well-made products most users will not experience any problems.
- Mild skin dryness
- Temporary redness or stinging on very sensitive skin
- Eye irritation if the lather accidentally gets into the eyes
- Rare allergic contact dermatitis in individuals sensitive to amide-type surfactants
If any irritation or unexpected reaction occurs discontinue use and seek advice from a healthcare professional.
Comedogenic Rating
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Sodium Caproamphopropionate is highly water soluble and designed for rinse-off products, so it does not linger on the skin or clog pores. Its molecular structure lacks heavy oils or waxes, keeping it from creating the kind of film that can trap sebum and debris. Because of this, it is considered non-comedogenic and is suitable for people prone to acne or breakouts.
Since it is usually paired with other mild surfactants in cleansers and shampoos, its presence can even help remove pore-clogging residues left by richer ingredients.
Summary
Sodium Caproamphopropionate is a gentle, plant-derived surfactant that cleanses, boosts foam, and adds light conditioning without stripping skin or hair. Its balanced oil-loving and water-loving parts let it lift away grime then rinse clean, while its amphoteric nature stabilizes rich lather and softens hair cuticles.
Although it is not as famous as sulfates or newer trendy surfactants, formulators value it in sulfate-free face washes, body washes, kids’ bath products and mild shampoos where comfort and a creamy foam are must-haves.
Current research finds it safe for all skin types with a very low irritation potential. As with any new cosmetic product, doing a quick patch test is a smart precaution before adding it to your routine.