Ingredient review

PPG-24-Buteth-27

INCI: PPG-24-BUTETH-27

A reliable synthetic emulsifier that helps keep your lotions and creams smooth and stable, but it's not a star active ingredient.

beautyskincareemulsifier

In plain English

PPG-24-Buteth-27 is a man-made ingredient that helps oil and water mix together in products like lotions and cleansers. Without it, your moisturizer would separate into a watery layer and an oily layer. It's a workhorse ingredient that makes the texture feel smooth and consistent, but it doesn't directly hydrate or treat your skin.

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.

Risk flags are low for most users, though the finished product can still irritate.

Source
synthetic
Evidence
moderate
Irritation
low
Clogging risk
low
How reviews are scored

Quick decision guide

Useful, but context matters

PPG-24-Buteth-27 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging PPG-24-Buteth-27.
  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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

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 polymer made from propylene oxide and butyl alcohol, used as an emulsifier and surfactant in cosmetics.

How it works

It reduces the surface tension between oil and water, allowing them to form a stable, uniform mixture. This prevents separation and gives products a smooth, spreadable texture.

Pros

Stable emulsions

Keeps oil and water mixed so your product stays smooth and effective from first use to last.

Low irritation risk

Generally well-tolerated by most skin types, including sensitive skin, at typical use levels.

Cons and cautions

No active skin benefit

It's purely a formulation aid—it doesn't moisturize, soothe, or treat skin conditions on its own.

Synthetic origin

Derived from petrochemicals, which may be a concern for those preferring natural or biodegradable ingredients.

Best for

  • Anyone using standard moisturizers or cleansers
  • People who prefer stable, non-separating products

Use caution if

  • Those seeking only natural or plant-based ingredients
  • Individuals with known sensitivity to synthetic emulsifiers (rare)

Usage tips

Look for it in the middle to end of the ingredient list—it's used in small amounts.
If you have very sensitive skin and react to many products, patch test a new formula containing this ingredient.

Safety summary

PPG-24-Buteth-27 is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential. The Cosmetic Ingredient Review (CIR) panel has reviewed similar PPG ethers and found them safe as used.

Research notes

Limited direct studies on PPG-24-Buteth-27 specifically, but the broader class of PPG alkyl ethers has been evaluated by the CIR and found safe. No significant toxicity or irritation concerns have been reported in cosmetic use.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics by the FDA and EU CosIng database at concentrations up to 5%.
Common uses
Moisturizers, Cleansers, Sunscreens, Hair products
Environmental note
As a synthetic polymer, it may not be readily biodegradable; however, it is used in low concentrations.

Good to know

  • PPG-24-Buteth-27 is often used alongside other emulsifiers for extra stability.
  • It is not a preservative, so it won't prevent microbial growth on its own.

Common questions

What is PPG-24-Buteth-27 in beauty products?

PPG-24-Buteth-27 is a man-made ingredient that helps oil and water mix together in products like lotions and cleansers. Without it, your moisturizer would separate into a watery layer and an oily layer. It's a workhorse ingredient that makes the texture feel smooth and consistent, but it doesn't directly hydrate or treat your skin.

What does PPG-24-Buteth-27 do in a beauty product?

It reduces the surface tension between oil and water, allowing them to form a stable, uniform mixture. This prevents separation and gives products a smooth, spreadable texture.

Is PPG-24-Buteth-27 safe for most people?

PPG-24-Buteth-27 is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential. The Cosmetic Ingredient Review (CIR) panel has reviewed similar PPG ethers and found them safe as used.

Who should be careful with PPG-24-Buteth-27?

Those seeking only natural or plant-based ingredients Individuals with known sensitivity to synthetic emulsifiers (rare)

Research sources

Cosmetic Ingredient Review (CIR) - Safety Assessment of PPG Alkyl EthersOpenEU CosIng Database - PPG-24-Buteth-27OpenPubMed - Safety of PPG ethers in cosmeticsOpen

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.