Ingredient review

PPG-4 C13-15 Pareth-15

INCI: PPG-4 C13-15 PARETH-15

A workhorse synthetic emulsifier that helps products rinse clean, but can be drying for sensitive skin.

beautyskincaresurfactant

In plain English

PPG-4 C13-15 Pareth-15 is a man-made ingredient that helps oil and water mix together in your cleansers and shampoos. It also helps dirt and makeup rinse off your skin. Think of it as a gentle soap-like helper that makes your products spread easily and wash away cleanly.

Review score

Safety, usefulness, and evidence

3.5Good
3.5/ 5

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
How reviews are scored

Quick decision guide

Useful, but context matters

PPG-4 C13-15 Pareth-15 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging PPG-4 C13-15 Pareth-15.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

moderate

Can bother some users, especially with frequent use, damaged skin, or strong companion ingredients.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic surfactant and emulsifier from the alkyl polyglycol ether family, created by reacting fatty alcohols with ethylene oxide and propylene oxide.

How it works

It reduces the surface tension between oil and water, allowing them to blend into a stable mixture. In a cleanser, it surrounds oil and dirt particles so they can be rinsed away with water.

Pros

Effective cleanser

Removes oil, makeup, and dirt efficiently without leaving a greasy residue.

Good foam

Creates a satisfying lather that many people enjoy in shampoos and body washes.

Cons and cautions

Potential dryness

Overuse or high concentrations can strip natural oils, leading to tightness or flakiness.

Ethoxylation concerns

As an ethoxylated ingredient, it may contain trace impurities like 1,4-dioxane, though levels are regulated.

Best for

  • People with normal to oily skin
  • Those who prefer foaming cleansers

Use caution if

  • Those with very dry or compromised skin
  • Anyone with a known sensitivity to ethoxylated ingredients

Usage tips

Use a moisturizer after cleansing if your skin feels tight.
Avoid using multiple ethoxylated cleansers in the same routine.

Safety summary

Generally safe for most people when used in rinse-off products. Those with very sensitive or dry skin may prefer milder alternatives.

Research notes

Studies show it is an effective emulsifier with low acute toxicity. Long-term safety data is limited, but regulatory bodies consider it safe at typical use levels.

Common label clues

Typical concentration
1–10%
Regulatory status
Approved for use in cosmetics in the US, EU, and many other regions. Manufacturers are required to keep 1,4-dioxane levels within safe limits.
Common uses
Cleansers, Shampoos, Body washes, Makeup removers
Environmental note
Synthetic and petroleum-derived, but generally biodegradable in standard wastewater treatment conditions.

Good to know

  • This ingredient is often found in rinse-off products, not leave-on creams.
  • It is considered biodegradable in many formulations.

Common questions

What is PPG-4 C13-15 Pareth-15 in beauty products?

PPG-4 C13-15 Pareth-15 is a man-made ingredient that helps oil and water mix together in your cleansers and shampoos. It also helps dirt and makeup rinse off your skin. Think of it as a gentle soap-like helper that makes your products spread easily and wash away cleanly.

What does PPG-4 C13-15 Pareth-15 do in a beauty product?

It reduces the surface tension between oil and water, allowing them to blend into a stable mixture. In a cleanser, it surrounds oil and dirt particles so they can be rinsed away with water.

Is PPG-4 C13-15 Pareth-15 safe for most people?

Generally safe for most people when used in rinse-off products. Those with very sensitive or dry skin may prefer milder alternatives.

Who should be careful with PPG-4 C13-15 Pareth-15?

Those with very dry or compromised skin Anyone with a known sensitivity to ethoxylated ingredients

Research sources

CosIng Database - European CommissionOpenEnvironmental Working Group - Ingredient SafetyOpenPubMed - Surfactant Safety ReviewOpen

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.