What Is Butylethylpropanediol Dimer Dilinoleate?
Butylethylpropanediol Dimer Dilinoleate is a specialty ester that results from combining dilinoleic acid, a fatty acid often sourced from plant oils like soybean or safflower, with butylethylpropanediol, a synthetic diol. The reaction binds the two ingredients into a single molecule that behaves like a lightweight, pliable oil. First introduced in the early 2000s as formulators searched for non-greasy alternatives to mineral oils and silicones, it quickly found favor in skin care laboratories thanks to its smooth skin feel and versatile texture.
Manufacturing begins with the purification of plant-derived dilinoleic acid. This acid is reacted with butylethylpropanediol in the presence of a catalyst under controlled heat. Once the desired ester bond forms, the mixture is purified to remove residual reactants, producing a clear to pale yellow liquid that blends easily with other cosmetic ingredients.
Because it spreads well yet is less occlusive than heavier oils, Butylethylpropanediol Dimer Dilinoleate shows up in moisturizers, sleeping masks, anti-aging serums, color cosmetics like foundations, makeup primers and targeted treatments that need a light film on the skin to lock in moisture or enhance wear time.
Butylethylpropanediol Dimer Dilinoleate’s Cosmetic Benefits/Uses
This ingredient serves more than one purpose in a formula, offering practical advantages for both the product and the user.
- Film Forming – Creates a soft, invisible layer on the skin that helps hold water in place, boosts the longevity of makeup and protects against environmental stressors without feeling heavy
- Skin Conditioning – Leaves the skin feeling smooth and supple, improves overall texture and delivers a subtle glow that can make complexion products look more natural
Who Can Use Butylethylpropanediol Dimer Dilinoleate
This lightweight ester suits most skin types, especially normal, dry and combination skin that appreciate extra softness without a greasy afterfeel. Oily or acne-prone skin generally tolerates it well because its texture is thin and non-occlusive, though those who are extremely blemish-prone may prefer to monitor use and pair it with products labeled non-comedogenic.
The ingredient is synthesized from plant-derived fatty acids and a lab-made diol, so it is free of animal derivatives and is considered suitable for vegans and vegetarians.
No data suggest specific risks for pregnant or breastfeeding women when the ingredient is applied topically in cosmetic concentrations. This information is not medical advice and anyone who is pregnant or nursing should review all skincare products with a healthcare professional to be extra safe.
Butylethylpropanediol Dimer Dilinoleate does not increase photosensitivity, so daytime use is generally fine without added sun precautions beyond the usual recommendation to wear sunscreen.
Potential Side Effects/Adverse Reactions
Reactions to topical Butylethylpropanediol Dimer Dilinoleate differ from person to person. The points below outline possible but uncommon side effects when the ingredient is used in a properly formulated product.
- Mild redness or irritation
- Transient stinging on very sensitive or compromised skin
- Rare allergic contact dermatitis in individuals sensitive to esters or related compounds
If any discomfort, persistent redness or other adverse effect occurs stop using the product and consult a healthcare professional if needed.
Comedogenic Rating
Rating: 1/5. Butylethylpropanediol Dimer Dilinoleate is a lightweight ester that spreads thinly and does not form a thick occlusive barrier, which reduces the chance of blocked pores. Its molecular structure is bulkier than the straight-chain fatty acids that typically cause congestion, so it is less likely to build up inside follicles.
Most people prone to acne or breakouts can use products containing this ingredient without major concern, though individual skin responses always vary.
Like many esters, its behavior also depends on the full formula. When paired with heavy waxes or rich butters the finished product could feel greasier, which might change real-world pore-clogging potential.
Summary
Butylethylpropanediol Dimer Dilinoleate functions mainly as a film former and skin-conditioning agent. The ester settles into a thin, flexible layer that slows water loss and leaves skin feeling smooth, which helps moisturizers last longer and makeup wear better.
While not a household name, it is quietly popular among formulators who need a silky alternative to silicones or mineral oil. You will spot it in modern moisturizers, primers and overnight masks where a light yet protective finish is desired.
Current safety data show a very low risk of irritation or sensitization at cosmetic use levels, making it a generally safe pick for daily skincare. As with any new ingredient it is smart to patch test a product first to confirm personal tolerance.