Ingredient review
PPG-6 C9-11 Pareth-5
INCI: PPG-6 C9-11 PARETH-5
A synthetic emulsifier that helps mix oil and water, but may be slightly drying or irritating for sensitive skin.
In plain English
PPG-6 C9-11 Pareth-5 is a man-made ingredient that helps oil and water blend together in products like cleansers and lotions. It's a type of surfactant, which means it can also help lift dirt and oil from your skin so they rinse away. Because it's synthetic, it's very consistent and stable, but it can be a bit too stripping for dry or sensitive skin if used in high amounts.
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
PPG-6 C9-11 Pareth-5 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 PPG-6 C9-11 Pareth-5.
- 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 synthetic, ethoxylated surfactant and emulsifier derived from fatty alcohols and propylene glycol. It belongs to the 'pareth' family of ingredients, which are known for their ability to reduce surface tension between oil and water.
How it works
In a cosmetic formula, it sits at the boundary between oil and water droplets, lowering surface tension so they mix into a stable emulsion. In cleansers, it also helps break down sebum and grime so they can be rinsed away with water.
Pros
Effective emulsifier
It reliably blends oil and water, giving lotions and cleansers a smooth, uniform texture that feels pleasant on the skin.
Good cleansing power
It helps remove excess oil, makeup, and impurities from the skin's surface, making it useful in daily cleansers and shampoos.
Cons and cautions
Potential for irritation
As a synthetic surfactant, it can strip the skin's natural oils, leading to dryness or irritation, especially for those with sensitive or eczema-prone skin.
Ethoxylation concerns
The manufacturing process can create trace amounts of 1,4-dioxane, a potential contaminant. While levels are regulated, some consumers prefer to avoid ethoxylated ingredients altogether.
Best for
- People with normal to oily skin looking for effective cleansers
- Those who use rinse-off products like shampoos and body washes
Use caution if
- Individuals with very dry, compromised, or sensitive skin
- Anyone who prefers completely natural or non-ethoxylated ingredients
Usage tips
Safety summary
Generally considered safe for use in rinse-off cosmetics at typical concentrations. The main concerns are potential skin irritation and trace impurities from ethoxylation, which are regulated. Patch testing is recommended for sensitive individuals.
Research notes
Safety assessments by expert panels (e.g., CIR) have reviewed ethoxylated surfactants and found them safe when formulated within limits. Studies focus on irritation potential and impurity levels rather than long-term health effects.
Common label clues
- Typical concentration
- Typically 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. Manufacturers are required to keep 1,4-dioxane levels low (typically below 10 ppm).
- Common uses
- Cleansers, Shampoos, Body washes, Emulsions
- Environmental note
- As a synthetic ethoxylated compound, it may have moderate biodegradability. Some consumers choose plant-based alternatives for environmental reasons.
Good to know
- This ingredient is often found in combination with other mild surfactants to reduce its potential harshness.
- It is not typically used in high concentrations in leave-on products like creams or serums.
Common questions
What is PPG-6 C9-11 Pareth-5 in beauty products?
PPG-6 C9-11 Pareth-5 is a man-made ingredient that helps oil and water blend together in products like cleansers and lotions. It's a type of surfactant, which means it can also help lift dirt and oil from your skin so they rinse away. Because it's synthetic, it's very consistent and stable, but it can be a bit too stripping for dry or sensitive skin if used in high amounts.
What does PPG-6 C9-11 Pareth-5 do in a beauty product?
In a cosmetic formula, it sits at the boundary between oil and water droplets, lowering surface tension so they mix into a stable emulsion. In cleansers, it also helps break down sebum and grime so they can be rinsed away with water.
Is PPG-6 C9-11 Pareth-5 safe for most people?
Generally considered safe for use in rinse-off cosmetics at typical concentrations. The main concerns are potential skin irritation and trace impurities from ethoxylation, which are regulated. Patch testing is recommended for sensitive individuals.
Who should be careful with PPG-6 C9-11 Pareth-5?
Individuals with very dry, compromised, or sensitive skin Anyone who prefers completely natural or non-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.