Ingredient review
Hydrogenated Dimer Dilinoleic Acid
INCI: Hydrogenated Dimer Dilinoleic Acid
A gentle, plant-derived emollient that helps products feel silky and stay put without clogging pores.
In plain English
Hydrogenated dimer dilinoleic acid is a waxy, plant-based ingredient made from fatty acids found in oils like sunflower or safflower. It's used in cosmetics to give a smooth, silky feel and to help products like lipstick or foundation stay on the skin longer. Because it's non-greasy and very unlikely to clog pores, it's a popular choice for sensitive or acne-prone skin.
Review score
Safety, usefulness, and evidence
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
- natural
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Hydrogenated Dimer Dilinoleic Acid 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 Dilinoleic Acid.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A hydrogenated dimer of dilinoleic acid, a fatty acid derived from plant oils. The hydrogenation process makes it more stable and waxy, so it acts as a thickening and film-forming agent in cosmetics.
How it works
It forms a thin, flexible film on the skin's surface that helps other ingredients stay put and resist water or sweat. It also adds a silky, non-greasy feel and helps stabilize the texture of lipsticks, balms, and foundations.
Pros
Non-comedogenic
Unlikely to clog pores, making it safe for acne-prone and oily skin types.
Improves wear time
Creates a flexible film that helps makeup and lip products last longer without smudging.
Cons and cautions
Can feel heavy
In high concentrations, some users may notice a waxy or heavy feel on the skin.
Not water-soluble
Best suited for oil-based or anhydrous formulas; not ideal for lightweight water-based gels.
Best for
- Anyone looking for a gentle, non-comedogenic emollient
- People with sensitive or acne-prone skin who want long-wear makeup
Use caution if
- Those who prefer completely water-based, oil-free products
- Individuals with known allergies to dimer acids (very rare)
Usage tips
Safety summary
Considered safe for cosmetic use with very low irritation and comedogenic potential. Rare allergic reactions are possible but extremely uncommon.
Research notes
Limited peer-reviewed studies specifically on this ingredient, but its components (dilinoleic acid and hydrogenated fatty acids) have a long history of safe use in cosmetics. Safety assessments by industry panels (e.g., CIR) support its use at typical concentrations.
Common label clues
- Typical concentration
- 1–10% in anhydrous formulas; lower in emulsions
- Regulatory status
- Approved for use in cosmetics globally, including by the FDA (USA) and EU CosIng database. No known restrictions at typical use levels.
- Common uses
- Lipsticks, Lip balms, Foundations, Water-resistant sunscreens, Eye shadows
- Environmental note
- Derived from renewable plant sources (e.g., sunflower, safflower). Biodegradable and not associated with microplastic concerns.
Good to know
- It is often used in 'clean' beauty formulas as a plant-based alternative to silicones or petroleum-derived waxes.
- The hydrogenation process makes it more stable and less likely to go rancid than unmodified oils.
Common questions
What is Hydrogenated Dimer Dilinoleic Acid in beauty products?
Hydrogenated dimer dilinoleic acid is a waxy, plant-based ingredient made from fatty acids found in oils like sunflower or safflower. It's used in cosmetics to give a smooth, silky feel and to help products like lipstick or foundation stay on the skin longer. Because it's non-greasy and very unlikely to clog pores, it's a popular choice for sensitive or acne-prone skin.
What does Hydrogenated Dimer Dilinoleic Acid do in a beauty product?
It forms a thin, flexible film on the skin's surface that helps other ingredients stay put and resist water or sweat. It also adds a silky, non-greasy feel and helps stabilize the texture of lipsticks, balms, and foundations.
Is Hydrogenated Dimer Dilinoleic Acid safe for most people?
Considered safe for cosmetic use with very low irritation and comedogenic potential. Rare allergic reactions are possible but extremely uncommon.
Who should be careful with Hydrogenated Dimer Dilinoleic Acid?
Those who prefer completely water-based, oil-free products Individuals with known allergies to dimer acids (very rare)
Research sources
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.