Ingredient review
Laureth-3 Phosphate
INCI: LAURETH-3 PHOSPHATE
A gentle surfactant that helps cleanse without stripping the skin, but may not suit those with very sensitive or compromised barriers.
In plain English
Laureth-3 phosphate is a mild cleansing ingredient that helps water and oil mix together so they can be rinsed away easily. It's often used in face washes and shampoos to remove dirt and excess oil without leaving skin feeling tight or dry. Think of it as a gentle helper that lifts away grime while keeping your skin's natural moisture balance intact.
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-3 Phosphate 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-3 Phosphate.
- 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-3 phosphate is a semi-synthetic surfactant and emulsifier made from lauryl alcohol (derived from coconut or palm oil) and ethylene oxide, then reacted with phosphoric acid. It belongs to the alkyl phosphate family and is known for its mildness and ability to create stable emulsions.
How it works
In a cosmetic product, laureth-3 phosphate works by reducing the surface tension between oil and water. This allows it to surround and lift away dirt, sebum, and makeup from the skin, making them easy to rinse off. It also helps stabilize mixtures of oil and water in creams and lotions, preventing them from separating.
Pros
Gentle on skin
Laureth-3 phosphate cleans without stripping the skin's natural moisture barrier, making it suitable for daily use on normal to combination skin.
Versatile formulator
It works well in both rinse-off and leave-on products, helping create smooth, stable textures that feel pleasant on the skin.
Cons and cautions
Not for very sensitive skin
While mild, it can still cause slight dryness or irritation in those with very sensitive or damaged skin, so a patch test is wise.
Semi-synthetic origin
Derived from petrochemical processes, it may not appeal to consumers seeking 100% natural or plant-based ingredients.
Best for
- People with normal to combination skin looking for a gentle daily cleanser
- Those who prefer sulfate-free formulas but still want effective cleansing
Use caution if
- Individuals with severely compromised skin barriers or active eczema should patch-test first
Usage tips
Safety summary
Laureth-3 phosphate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, but those with very sensitive skin should patch-test first. Regulatory bodies like the CIR have reviewed it favorably.
Research notes
Studies on alkyl phosphates indicate they are mild surfactants with good skin compatibility. Research shows they cause less barrier disruption than sodium lauryl sulfate. However, long-term human data specific to laureth-3 phosphate is limited.
Common label clues
- Typical concentration
- 1–5% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. The Cosmetic Ingredient Review (CIR) panel has reviewed alkyl phosphates and found them safe as used.
- Common uses
- Cleansers, Shampoos, Body washes, Facial washes
- Environmental note
- Laureth-3 phosphate is biodegradable, but its production involves ethylene oxide, which has environmental concerns. Some manufacturers use green chemistry processes to reduce impact.
Good to know
- Laureth-3 phosphate is often found in sulfate-free shampoos and face washes
- It is considered biodegradable and generally safe for aquatic life at typical use levels
Common questions
What is Laureth-3 Phosphate in beauty products?
Laureth-3 phosphate is a mild cleansing ingredient that helps water and oil mix together so they can be rinsed away easily. It's often used in face washes and shampoos to remove dirt and excess oil without leaving skin feeling tight or dry. Think of it as a gentle helper that lifts away grime while keeping your skin's natural moisture balance intact.
What does Laureth-3 Phosphate do in a beauty product?
In a cosmetic product, laureth-3 phosphate works by reducing the surface tension between oil and water. This allows it to surround and lift away dirt, sebum, and makeup from the skin, making them easy to rinse off. It also helps stabilize mixtures of oil and water in creams and lotions, preventing them from separating.
Is Laureth-3 Phosphate safe for most people?
Laureth-3 phosphate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, but those with very sensitive skin should patch-test first. Regulatory bodies like the CIR have reviewed it favorably.
Who should be careful with Laureth-3 Phosphate?
Individuals with severely compromised skin barriers or active eczema should patch-test first
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.