Ingredient review
Sodium Laureth-17 Carboxylate
INCI: SODIUM LAURETH-17 CARBOXYLATE
A gentle, high-foaming surfactant that effectively cleanses without stripping the skin, making it a great alternative to harsher sulfates.
In plain English
Sodium Laureth-17 Carboxylate is a mild cleansing ingredient that helps create a rich lather in products like face washes and shampoos. It is derived from lauryl alcohol (from coconut or palm oil) and ethylene oxide, then modified to be extra gentle. Unlike traditional sulfates, it cleans without leaving your skin feeling tight or dry, which is why it's often used in sensitive-skin and baby care formulas.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Sodium Laureth-17 Carboxylate is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Sodium Laureth-17 Carboxylate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A semi-synthetic surfactant made by ethoxylating lauryl alcohol (from plant oils) and then carboxylating it to form a mild, high-foaming cleansing agent.
How it works
It reduces the surface tension between water and oil, allowing dirt, sebum, and makeup to be rinsed away. Its long ethoxylate chain (17 units) makes it larger and less penetrating than shorter-chain surfactants, which minimizes irritation while still producing abundant foam.
Pros
Extremely gentle on skin
Its large molecular structure means it doesn't penetrate the skin barrier, reducing the risk of irritation and dryness—ideal for sensitive or eczema-prone skin.
Excellent foaming ability
Creates a rich, stable lather that feels luxurious and satisfying, even at low concentrations, without the harshness of sodium lauryl sulfate.
Cons and cautions
Potential trace contaminant
The ethoxylation manufacturing process can generate trace amounts of 1,4-dioxane, a possible carcinogen. Reputable brands purify their ingredients to keep levels well below safety limits.
Not a standalone makeup remover
Because it's so mild, it may struggle to dissolve heavy or waterproof makeup on its own, often requiring a double-cleansing routine.
Best for
- People with dry or sensitive skin who want a gentle cleanser
- Those who prefer sulfate-free, low-irritation formulas
Use caution if
- Anyone seeking a single-step makeup remover for heavy or waterproof products
Usage tips
Safety summary
Sodium Laureth-17 Carboxylate is considered safe for use in rinse-off cosmetics at typical concentrations. The main safety consideration is the potential for trace 1,4-dioxane contamination, which reputable manufacturers control through purification. Overall, it poses a low risk of irritation or comedogenicity.
Research notes
Research on this specific surfactant is limited, but it is closely related to other ethoxylated carboxylates that have been reviewed by the CIR panel. Studies show that longer ethoxylate chains correlate with lower irritation potential. No significant safety concerns have been identified in published literature.
Common label clues
- Typical concentration
- 1–10% in rinse-off products
- Regulatory status
- Approved for use in cosmetics by the FDA and the European Commission. The Cosmetic Ingredient Review (CIR) panel has deemed it safe as used in rinse-off products.
- Common uses
- Facial cleansers, Body washes, Shampoos, Baby care products
- Environmental note
- The lauryl alcohol is typically sourced from coconut or palm oil. Look for RSPO-certified palm oil or sustainably sourced coconut to support environmental responsibility.
Good to know
- Sodium Laureth-17 Carboxylate is often listed near the top of ingredient lists in sulfate-free cleansers because it's a primary surfactant.
- It is considered biodegradable and is derived from renewable plant sources, though the ethoxylation step is synthetic.
Common questions
What is Sodium Laureth-17 Carboxylate in beauty products?
Sodium Laureth-17 Carboxylate is a mild cleansing ingredient that helps create a rich lather in products like face washes and shampoos. It is derived from lauryl alcohol (from coconut or palm oil) and ethylene oxide, then modified to be extra gentle. Unlike traditional sulfates, it cleans without leaving your skin feeling tight or dry, which is why it's often used in sensitive-skin and baby care formulas.
What does Sodium Laureth-17 Carboxylate do in a beauty product?
It reduces the surface tension between water and oil, allowing dirt, sebum, and makeup to be rinsed away. Its long ethoxylate chain (17 units) makes it larger and less penetrating than shorter-chain surfactants, which minimizes irritation while still producing abundant foam.
Is Sodium Laureth-17 Carboxylate safe for most people?
Sodium Laureth-17 Carboxylate is considered safe for use in rinse-off cosmetics at typical concentrations. The main safety consideration is the potential for trace 1,4-dioxane contamination, which reputable manufacturers control through purification. Overall, it poses a low risk of irritation or comedogenicity.
Who should be careful with Sodium Laureth-17 Carboxylate?
Anyone seeking a single-step makeup remover for heavy or waterproof products
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.