Ingredient review
C12-15 Pareth-2
INCI: C12-15 Pareth-2
A gentle, low-irritation cleansing agent that helps blend oil and water, making it a reliable choice for sensitive skin formulations.
In plain English
C12-15 Pareth-2 is a mild surfactant and emulsifier. Think of it as a helper that lets oil and water mix together in your cleanser or lotion. It's made from fatty alcohols (from natural oils) and ethylene oxide, but the process is carefully controlled to keep it gentle. Because it's non-ionic (no electric charge), it's less likely to strip your skin's natural moisture barrier compared to harsher cleansers.
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
C12-15 Pareth-2 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 C12-15 Pareth-2.
- 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, non-ionic surfactant and emulsifier produced by reacting a blend of C12-15 fatty alcohols with approximately 2 moles of ethylene oxide. It belongs to the alcohol ethoxylate family, known for their mildness and compatibility with other ingredients.
How it works
In a cosmetic product, C12-15 Pareth-2 reduces the surface tension between oil and water, allowing them to form a stable mixture. This helps lift dirt, makeup, and excess oil from the skin so they can be rinsed away. Because it's non-ionic, it works well across a wide pH range and doesn't interfere with the charge of other ingredients.
Pros
Very gentle on skin
Non-ionic surfactants like C12-15 Pareth-2 are among the mildest cleansing agents, making them ideal for sensitive or easily irritated skin.
Versatile formulator's tool
It works well in both rinse-off and leave-on products, helping create smooth, stable textures without needing high concentrations.
Cons and cautions
Ethoxylation concerns
The manufacturing process can create trace amounts of 1,4-dioxane, a potential contaminant. However, reputable brands purify their ingredients to meet safety limits set by regulators.
Not fully natural
Although derived from natural fatty alcohols, the ethoxylation step is synthetic. This may not appeal to those seeking exclusively natural or organic skincare.
Best for
- People with normal to dry or sensitive skin looking for a gentle cleanser
- Anyone who prefers mild, non-stripping surfactants in their daily routine
Use caution if
- Those with known allergies to ethoxylated ingredients (rare)
- Individuals seeking 100% natural or plant-derived surfactants only
Usage tips
Safety summary
C12-15 Pareth-2 is considered safe for use in cosmetics at typical concentrations. The main safety consideration is the potential for trace 1,4-dioxane contamination, but current manufacturing and purification methods keep levels well below safety thresholds. It has low irritation and comedogenic potential.
Research notes
Alcohol ethoxylates like C12-15 Pareth-2 have been reviewed by the Cosmetic Ingredient Review (CIR) panel, which concluded they are safe for use in rinse-off and leave-on products. Studies show they are significantly milder than anionic surfactants like sodium lauryl sulfate. No recent peer-reviewed studies specifically on C12-15 Pareth-2 were found, but the broader class is well-characterized.
Common label clues
- Typical concentration
- 1–5% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics by the FDA (as part of generally recognized safe ingredients) and by the European Commission under the CosIng database. The Cosmetic Ingredient Review (CIR) panel has reviewed alcohol ethoxylates and found them safe as used.
- Common uses
- Cleansers, Shampoos, Body washes, Makeup removers, Lotions
- Environmental note
- Derived from fatty alcohols that may come from palm or coconut oil. Look for sustainably sourced or RSPO-certified palm oil if environmental impact is a concern.
Good to know
- C12-15 Pareth-2 is often used alongside other emulsifiers to improve stability in creams and lotions.
- The number '2' in the name refers to the average number of ethylene oxide units, which influences its water solubility and mildness.
Common questions
What is C12-15 Pareth-2 in beauty products?
C12-15 Pareth-2 is a mild surfactant and emulsifier. Think of it as a helper that lets oil and water mix together in your cleanser or lotion. It's made from fatty alcohols (from natural oils) and ethylene oxide, but the process is carefully controlled to keep it gentle. Because it's non-ionic (no electric charge), it's less likely to strip your skin's natural moisture barrier compared to harsher cleansers.
What does C12-15 Pareth-2 do in a beauty product?
In a cosmetic product, C12-15 Pareth-2 reduces the surface tension between oil and water, allowing them to form a stable mixture. This helps lift dirt, makeup, and excess oil from the skin so they can be rinsed away. Because it's non-ionic, it works well across a wide pH range and doesn't interfere with the charge of other ingredients.
Is C12-15 Pareth-2 safe for most people?
C12-15 Pareth-2 is considered safe for use in cosmetics at typical concentrations. The main safety consideration is the potential for trace 1,4-dioxane contamination, but current manufacturing and purification methods keep levels well below safety thresholds. It has low irritation and comedogenic potential.
Who should be careful with C12-15 Pareth-2?
Those with known allergies to ethoxylated ingredients (rare) Individuals seeking 100% natural or plant-derived surfactants only
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.