Ingredient review
Di-C12-15 Pareth-6 Phosphate
INCI: DI-C12-15 PARETH-6 PHOSPHATE
A mild synthetic surfactant that helps cleanse without stripping, but may cause irritation in sensitive skin at high concentrations.
In plain English
This ingredient is a synthetic molecule that helps water and oil mix together in skincare products. It works as a gentle cleanser, lifting dirt and makeup from the skin so they can be rinsed away. It is often used in foaming cleansers and lotions to create a smooth, even texture.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Di-C12-15 Pareth-6 Phosphate can be useful, but watch for some irritation potential.
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 Di-C12-15 Pareth-6 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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 phosphate ester surfactant derived from synthetic fatty alcohols and ethylene oxide. It is designed to be milder than traditional sulfates like SLS.
How it works
It reduces the surface tension between oil and water, allowing them to blend. In cleansers, it helps trap and remove excess oil and debris. In creams, it keeps the formula stable and spreadable.
Pros
Mild cleansing action
Provides effective cleansing without the harshness of traditional sulfates, making it suitable for daily use on normal to oily skin.
Good emulsifier
Helps stabilize oil-and-water blends in creams and lotions, ensuring a consistent texture and feel.
Cons and cautions
Potential irritation
At higher concentrations or for sensitive skin, it may cause dryness, redness, or stinging, especially in leave-on products.
Synthetic origin
Derived from petrochemicals and ethylene oxide, which may be a concern for those seeking natural or minimal-ingredient routines.
Best for
- People with normal to oily skin looking for a gentle foaming cleanser
- Those who want a sulfate-free alternative in their wash-off products
Use caution if
- Individuals with very dry or compromised skin barriers
- Anyone with known sensitivity to phosphate esters or ethoxylated ingredients
Usage tips
Safety summary
Considered safe for use in rinse-off cosmetics at typical concentrations. Mild irritation or dryness is possible for sensitive skin. Avoid contact with eyes. The ethoxylation process may produce trace 1,4-dioxane, but reputable manufacturers keep levels within safe limits.
Research notes
Limited peer-reviewed studies specifically on this ingredient. General surfactant research indicates low acute toxicity and moderate skin compatibility. Safety assessments by industry panels (e.g., CIR) support its use in cosmetics at low concentrations.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and other major markets. No specific restrictions, but manufacturers must ensure purity and low levels of 1,4-dioxane (a byproduct of ethoxylation).
- Common uses
- Cleansers, Facial washes, Emulsions, Shampoos
- Environmental note
- As a synthetic surfactant, it may not be readily biodegradable. However, phosphate esters generally break down faster than some other synthetic surfactants.
Good to know
- This ingredient is often used in sulfate-free formulations to provide foam without harshness.
- It may appear on labels as a phosphate ester; it is not the same as phosphates used in household detergents.
Common questions
What is Di-C12-15 Pareth-6 Phosphate in beauty products?
This ingredient is a synthetic molecule that helps water and oil mix together in skincare products. It works as a gentle cleanser, lifting dirt and makeup from the skin so they can be rinsed away. It is often used in foaming cleansers and lotions to create a smooth, even texture.
What does Di-C12-15 Pareth-6 Phosphate do in a beauty product?
It reduces the surface tension between oil and water, allowing them to blend. In cleansers, it helps trap and remove excess oil and debris. In creams, it keeps the formula stable and spreadable.
Is Di-C12-15 Pareth-6 Phosphate safe for most people?
Considered safe for use in rinse-off cosmetics at typical concentrations. Mild irritation or dryness is possible for sensitive skin. Avoid contact with eyes. The ethoxylation process may produce trace 1,4-dioxane, but reputable manufacturers keep levels within safe limits.
Who should be careful with Di-C12-15 Pareth-6 Phosphate?
Individuals with very dry or compromised skin barriers Anyone with known sensitivity to phosphate esters or ethoxylated ingredients
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.