Ingredient review

Bis-PEG-3 Polyglyceryl-3 Ether

INCI: BIS-PEG-3 POLYGLYCERYL-3 ETHER

A gentle, PEG-based emulsifier that helps create stable, lightweight formulas without heavy residue.

beautyskincareemulsifier

In plain English

This ingredient is a helper molecule that allows water and oil to mix together in a stable cream or lotion. It is made by combining polyethylene glycol (PEG) with glycerin-derived compounds, which makes it water-friendly and mild on skin. It also has a slight skin-softening effect, so it can improve the feel of a product without leaving a greasy layer.

Review score

Safety, usefulness, and evidence

4.0Good

4.0/ 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: semi synthetic
Evidence: moderate
Irritation: low
Clogging risk: low

How reviews are scored

Quick decision guide

Useful, but context matters

Bis-PEG-3 Polyglyceryl-3 Ether 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 Bis-PEG-3 Polyglyceryl-3 Ether.
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

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

Bis-PEG-3 Polyglyceryl-3 Ether is a semi-synthetic emulsifier created by reacting polyethylene glycol (PEG) with polyglyceryl-3 ether. It belongs to a class of ingredients that reduce surface tension between oil and water, allowing them to form a stable, uniform mixture.

How it works

In a cosmetic product, this molecule positions itself at the boundary between oil and water droplets. Its water-loving (hydrophilic) PEG chains face the water, while its oil-loving (lipophilic) polyglyceryl portion embeds in the oil. This arrangement prevents the two phases from separating, resulting in a smooth, consistent texture. It also helps spread the product evenly on skin.

Pros

Lightweight feel

Unlike some wax-based emulsifiers, this ingredient leaves a silky, non-oily finish that works well under makeup or sunscreen.

Formula stability

It helps prevent creams and lotions from separating over time, so the product stays effective and consistent from first use to last.

Cons and cautions

PEG concerns

Some consumers prefer to avoid PEGs due to potential contamination with 1,4-dioxane during manufacturing, though cosmetic-grade PEGs are purified to safe levels.

Not fully natural

This is a semi-synthetic ingredient, so it won't appeal to those seeking 100% natural or organic formulations.

Best for

Anyone looking for a lightweight, stable moisturizer or serum
People with normal to combination skin who prefer non-greasy textures

Use caution if

Those who strictly avoid all PEG-derived ingredients for personal reasons

Usage tips

Use in the oil phase of your formulation for best emulsification results.

Combine with a co-emulsifier like cetearyl alcohol for thicker creams.

Store finished products in a cool, dry place to maintain emulsion stability.

Safety summary

Bis-PEG-3 Polyglyceryl-3 Ether is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. The main safety consideration is the purity of the PEG starting material, which is tightly controlled by cosmetic ingredient manufacturers.

Research notes

Safety assessments of PEG and polyglyceryl ethers by the Cosmetic Ingredient Review (CIR) panel have concluded they are safe as used in cosmetics. Specific studies on this exact compound are limited, but its chemical class is well-characterized and widely used.

Common label clues

Typical concentration: 0.5% to 5%
Regulatory status: Approved for use in cosmetics in the EU, US, and other major markets. PEG compounds are regulated to limit 1,4-dioxane content to safe levels (typically below 10 ppm).
Common uses: Moisturizers, Serums, Cleansers, Sunscreens
Environmental note: PEG-based ingredients are not readily biodegradable in all aquatic environments, but they are considered low in toxicity to aquatic life at typical cosmetic use concentrations.

Good to know

This ingredient is often listed near the middle of an INCI list, indicating it is used at moderate concentrations.
It is compatible with a wide pH range (4–8), making it versatile for different product types.

Common questions

What is Bis-PEG-3 Polyglyceryl-3 Ether in beauty products?

What does Bis-PEG-3 Polyglyceryl-3 Ether do in a beauty product?

Is Bis-PEG-3 Polyglyceryl-3 Ether safe for most people?

Who should be careful with Bis-PEG-3 Polyglyceryl-3 Ether?

Those who strictly avoid all PEG-derived ingredients for personal reasons

Research sources

Cosmetic Ingredient Review (CIR) – Safety Assessment of PEGsOpen European Chemicals Agency (ECHA) – PEG derivativesOpen PubMed – Polyglyceryl esters 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.