Ingredient review
Laureth-17 Carboxylic Acid
INCI: LAURETH-17 CARBOXYLIC ACID
A gentle, semi-synthetic surfactant that helps cleanse without stripping the skin, making it a good choice for sensitive or dry skin types.
In plain English
Laureth-17 Carboxylic Acid is a mild cleansing ingredient that helps remove dirt and oil from your skin and hair without causing dryness or irritation. It's made from lauryl alcohol (derived from coconut or palm oil) and ethylene oxide, then modified to be less harsh than traditional soaps. You'll find it in gentle cleansers, shampoos, and body washes where it creates a soft lather and leaves skin feeling smooth.
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
Laureth-17 Carboxylic Acid 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 Laureth-17 Carboxylic Acid.
- 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
Laureth-17 Carboxylic Acid is a semi-synthetic surfactant and emulsifier. It belongs to the alkyl ether carboxylic acid family, which are known for their mildness and ability to work well in both acidic and neutral pH formulas.
How it works
It works by reducing the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. Its carboxylic acid group makes it less irritating than many other surfactants, and it helps stabilize emulsions so that oil and water ingredients stay mixed in a product.
Pros
Very gentle on skin
Unlike harsher sulfates, Laureth-17 Carboxylic Acid cleanses without stripping the skin's natural oils, making it ideal for dry or sensitive skin.
Improves product feel
It helps create a smooth, creamy texture and stable foam, enhancing the overall user experience in cleansers and shampoos.
Cons and cautions
Semi-synthetic origin
Because it's made using ethylene oxide, some consumers prefer fully natural alternatives like glucosides, even though the final ingredient is considered safe.
Less common in natural lines
You won't find this ingredient in many '100% natural' products, so it may not fit a strict clean-beauty philosophy.
Best for
- People with dry or sensitive skin looking for a mild cleanser
- Anyone wanting a gentle, low-irritation surfactant in their daily routine
Use caution if
- Those who prefer exclusively natural or organic ingredients may want to choose a plant-derived glucoside instead
Usage tips
Safety summary
Laureth-17 Carboxylic Acid is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential, making it suitable for sensitive skin. As with all surfactants, avoid eye contact in concentrated forms.
Research notes
Alkyl ether carboxylic acids like Laureth-17 Carboxylic Acid have been reviewed by the Cosmetic Ingredient Review panel, which concluded they are safe for cosmetic use. Studies show they are significantly milder than sodium lauryl sulfate and cause less skin barrier disruption.
Common label clues
- Typical concentration
- 1–5% in rinse-off products; lower in leave-on formulations
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database. The Cosmetic Ingredient Review (CIR) panel has evaluated alkyl ether carboxylic acids and found them safe as used.
- Common uses
- Cleansers, Shampoos, Body washes, Facial washes
- Environmental note
- This ingredient is biodegradable, but its production involves ethylene oxide, which requires careful industrial handling. Some sources derive lauryl alcohol from sustainable palm oil.
Good to know
- Laureth-17 Carboxylic Acid is often used in 'pH-balanced' cleansers because it works well at skin-friendly pH levels.
- It is considered biodegradable and has a good environmental profile compared to some older surfactants.
Common questions
What is Laureth-17 Carboxylic Acid in beauty products?
Laureth-17 Carboxylic Acid is a mild cleansing ingredient that helps remove dirt and oil from your skin and hair without causing dryness or irritation. It's made from lauryl alcohol (derived from coconut or palm oil) and ethylene oxide, then modified to be less harsh than traditional soaps. You'll find it in gentle cleansers, shampoos, and body washes where it creates a soft lather and leaves skin feeling smooth.
What does Laureth-17 Carboxylic Acid do in a beauty product?
It works by reducing the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. Its carboxylic acid group makes it less irritating than many other surfactants, and it helps stabilize emulsions so that oil and water ingredients stay mixed in a product.
Is Laureth-17 Carboxylic Acid safe for most people?
Laureth-17 Carboxylic Acid is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential, making it suitable for sensitive skin. As with all surfactants, avoid eye contact in concentrated forms.
Who should be careful with Laureth-17 Carboxylic Acid?
Those who prefer exclusively natural or organic ingredients may want to choose a plant-derived glucoside instead
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.