Ingredient review

PEG-30 Hydrogenated Dimer Dilinoleate

INCI: PEG-30 Hydrogenated Dimer Dilinoleate

A reliable synthetic emulsifier that helps create smooth, stable formulas, but may be less suitable for those avoiding PEG compounds.

beautyskincareemulsifier

In plain English

PEG-30 Hydrogenated Dimer Dilinoleate is a man-made ingredient that helps oil and water mix together in creams, lotions, and makeup. Without it, many products would separate into watery and oily layers. It also helps keep the texture consistent and prevents ingredients from clumping. Think of it as a gentle glue that holds the formula together so you get a smooth, even application every time.

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: synthetic
Evidence: moderate
Irritation: low
Clogging risk: low

How reviews are scored

Quick decision guide

Useful, but context matters

PEG-30 Hydrogenated Dimer Dilinoleate 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 PEG-30 Hydrogenated Dimer Dilinoleate.
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

A synthetic polymer made by reacting hydrogenated dimer dilinoleic acid (a fatty acid derived from castor oil) with polyethylene glycol (PEG). It belongs to a family of emulsifiers known for their ability to stabilize water-in-oil and oil-in-water emulsions.

How it works

Its molecular structure has both water-loving (hydrophilic) and oil-loving (lipophilic) parts. When added to a formula, it positions itself at the boundary between oil and water droplets, reducing surface tension and preventing them from separating. This creates a stable, uniform emulsion that feels smooth and spreads easily on skin.

Pros

Excellent emulsion stability

Helps keep oil and water mixed together, so your product stays smooth and doesn't separate over time.

Low irritation potential

Generally well-tolerated by most skin types, including sensitive skin, when used at typical concentrations.

Cons and cautions

Synthetic origin

Made from petrochemical-derived PEG, which may be a concern for those seeking natural or minimal-ingredient routines.

Potential purity concerns

If not manufactured to high standards, PEG compounds can contain trace impurities like ethylene oxide or 1,4-dioxane, though reputable brands ensure proper purification.

Best for

Anyone using conventional moisturizers, sunscreens, or foundations
People with normal to combination skin looking for reliable texture and stability

Use caution if

Those who strictly avoid synthetic or PEG-based ingredients in their skincare

Usage tips

Look for products from brands that disclose their purification processes to ensure high-quality PEG ingredients.

If you prefer to avoid PEGs entirely, check the ingredient list for alternatives like glyceryl stearate or cetearyl alcohol.

Safety summary

PEG-30 Hydrogenated Dimer Dilinoleate is considered safe for use in cosmetics at typical concentrations. The main safety consideration is the potential for trace impurities in PEG compounds, but reputable manufacturers use purification steps to remove them. It has low irritation and comedogenic risk.

Research notes

There is limited direct research on this specific ingredient, but the broader class of PEG emulsifiers has been reviewed by the Cosmetic Ingredient Review (CIR) panel and found safe for cosmetic use. Studies confirm their effectiveness as emulsifiers and stabilizers with low skin irritation potential.

Common label clues

Typical concentration: 1–5%
Regulatory status: Approved for use in cosmetics in the US (FDA), EU (CosIng), and many other regions. The Cosmetic Ingredient Review (CIR) panel has evaluated related PEG compounds and found them safe for use when formulated to minimize impurities.
Common uses: Moisturizers, Sunscreens, Foundations, Cleansers
Environmental note: As a synthetic polymer, it is not biodegradable. However, it is used in small amounts and is not known to accumulate in the environment significantly.

Good to know

PEG-30 Hydrogenated Dimer Dilinoleate is often used in combination with other emulsifiers to achieve the perfect texture.
It is not a preservative, so products containing it still require a proper preservation system.

Common questions

What is PEG-30 Hydrogenated Dimer Dilinoleate in beauty products?

What does PEG-30 Hydrogenated Dimer Dilinoleate do in a beauty product?

Is PEG-30 Hydrogenated Dimer Dilinoleate safe for most people?

Who should be careful with PEG-30 Hydrogenated Dimer Dilinoleate?

Those who strictly avoid synthetic or PEG-based ingredients in their skincare

Research sources

Cosmetic Ingredient Review (CIR) – Safety Assessment of PEGsOpen European Commission CosIng DatabaseOpen FDA – Cosmetic Ingredient DirectoryOpen

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.