Ingredient review

Hydrogenated Dimer Dilinoleth-30

INCI: Hydrogenated Dimer Dilinoleth-30

A gentle, high-performance emulsifier that helps water and oil mix into a stable, creamy texture without irritation.

beautyskincareemulsifier

In plain English

This ingredient is a synthetic helper that allows water and oil to blend together smoothly in creams and lotions. Think of it as a tiny bridge that holds the two ingredients together so your moisturizer stays creamy and doesn't separate. It's made from a fatty acid found in plants, but it's processed in a lab to be very stable and gentle on skin.

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

Hydrogenated Dimer Dilinoleth-30 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 Hydrogenated Dimer Dilinoleth-30.
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

Hydrogenated Dimer Dilinoleth-30 is a high-molecular-weight, non-ionic emulsifier created by reacting dimer dilinoleic acid (a plant-derived fatty acid) with ethylene oxide, then hydrogenating it. Its large molecular size means it stays mostly on the skin's surface, providing a smooth feel without deep penetration.

How it works

In a cosmetic formula, this ingredient reduces the surface tension between water and oil phases, allowing them to form a stable, uniform mixture (emulsion). It also helps thicken the product and improve its spreadability, leaving a non-greasy, velvety finish on the skin.

Pros

Gentle on skin

Its large molecular size means it stays on the surface, making it very unlikely to cause irritation or clog pores—great for sensitive or acne-prone skin.

Improves product texture

It gives creams and lotions a smooth, velvety feel that glides on easily without leaving a sticky or greasy residue.

Cons and cautions

Synthetic processing

Even though it starts from a plant-based fatty acid, it undergoes chemical processing (ethoxylation and hydrogenation), which may be a turn-off for those seeking minimally processed ingredients.

Limited research

Compared to classic emulsifiers, there is less published research on this specific ingredient, though its safety profile is supported by its chemical class and regulatory approvals.

Best for

Anyone looking for a gentle, non-irritating moisturizer or cream
People with sensitive or reactive skin who need stable, simple formulas

Use caution if

Those who strictly avoid all synthetic ingredients in their skincare

Usage tips

Look for this ingredient in the middle to end of the ingredient list—it's effective at low concentrations.

Pair it with other gentle emulsifiers for a well-rounded, stable formula that feels luxurious on the skin.

Safety summary

Hydrogenated Dimer Dilinoleth-30 is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive skin. No significant safety concerns have been reported in regulatory reviews.

Research notes

While specific studies on this exact ingredient are limited, the broader class of ethoxylated fatty acid emulsifiers has been reviewed by cosmetic safety panels (e.g., CIR) and found safe for topical use. Its large molecular weight minimizes skin penetration, supporting its low-risk profile.

Common label clues

Typical concentration: 0.5% to 5%
Regulatory status: Approved for use in cosmetics in the EU, US, and other major markets. It is not classified as a hazardous substance under normal use conditions.
Common uses: Moisturizers, Creams, Lotions, Sunscreens, Makeup removers
Environmental note: As a synthetic polymer, it may not be readily biodegradable. However, its large molecular size reduces its potential to bioaccumulate. Always check brand-specific sustainability claims.

Good to know

It is often used in 'silicone-free' formulas to mimic the smooth feel of silicones.
The '30' in its name refers to the average number of ethylene oxide units, which affects its water solubility.

Common questions

What is Hydrogenated Dimer Dilinoleth-30 in beauty products?

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

Is Hydrogenated Dimer Dilinoleth-30 safe for most people?

Who should be careful with Hydrogenated Dimer Dilinoleth-30?

Those who strictly avoid all synthetic ingredients in their skincare

Research sources

Cosmetic Ingredient Review (CIR) - Safety of Fatty Acid EthoxylatesOpen PubChem - Dimer Dilinoleic AcidOpen European Chemicals Agency (ECHA) - Hydrogenated Dimer Dilinoleth-30Open

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.