What Is Di-C16-18 Alkyl Dimer Dilinoleate?
Di-C16-18 Alkyl Dimer Dilinoleate is a plant-derived ester created by linking long-chain fatty alcohols from coconut or palm with dimerized linoleic acid obtained from vegetable oils like soybean or sunflower. The pairing of C16-18 alcohols with dilinoleic acid produces a silky oil that mimics the skin’s own lipids, which is why it feels so comfortable on the skin.
The ingredient gained traction in the late 1990s when formulators looked for natural alternatives to mineral oil that could still give a rich, cushiony feel. Advances in green chemistry allowed the fatty acids to be dimerized—essentially joined into larger, more stable molecules—then esterified with the fatty alcohols. The process involves high-temperature vacuum distillation followed by catalytic esterification, resulting in a clear, low-odor liquid that stays stable over a wide temperature range.
Its luxurious skin feel and oxidative stability make it popular in many products. You will often spot it in nourishing face and body moisturizers, soothing masks, conditioning lip balms, age-defying creams and after-sun treatments where extra softness and barrier support are needed.
Di-C16-18 Alkyl Dimer Dilinoleate’s Cosmetic Benefits/Uses
This ingredient plays two key roles in skincare formulas
- Skin conditioning: Helps smooth the skin surface and improve suppleness, giving products a pampering finish that leaves the skin feeling soft rather than greasy
- Emollient: Forms a lightweight occlusive layer that locks in moisture, supports the skin barrier and enhances spreadability so creams and balms glide on effortlessly
Who Can Use Di-C16-18 Alkyl Dimer Dilinoleate
Because it is a lightweight yet cushioning oil, Di-C16-18 Alkyl Dimer Dilinoleate suits most skin types. Dry, mature and sensitive skin benefit the most from its barrier-supporting properties while normal and combination skin appreciate its silky feel without greasiness. Those with very oily or acne-prone skin can usually tolerate it, though they may prefer using it in rinse-off or lighter formulations to avoid feeling overly emollient.
The ingredient is sourced from plants so it fits vegan and vegetarian lifestyles. No animal-derived feedstocks are needed in its production, which makes it compatible with cruelty-free goals when used in products from brands that follow such standards.
Current safety data show no specific risks for pregnant or breastfeeding women. The molecule is too large to penetrate deeply and is considered non-hormonal, but this is not medical advice. Anyone who is expecting or nursing should check any skincare routine with a qualified healthcare professional to be extra safe.
Di-C16-18 Alkyl Dimer Dilinoleate does not increase photosensitivity and can be worn during the day alongside sunscreen. It also plays well with common actives like vitamin C, niacinamide and retinoids, helping offset potential dryness from those stronger ingredients.
Potential Side Effects/Adverse Reactions
Reactions to topical Di-C16-18 Alkyl Dimer Dilinoleate vary from person to person. The effects below are possible yet uncommon, especially when the ingredient is used at standard levels in well-formulated products.
• Mild skin irritation – a stinging or itchy feel on compromised or very reactive skin
• Contact dermatitis – rare allergy presenting as redness or small bumps
• Temporary clogged pores – mostly in individuals already prone to congestion when heavy layers are applied
• Interaction with other occlusives – layering multiple rich oils or butters may feel overly heavy for some users
If any discomfort, rash or breakout appears stop use immediately and consult a dermatologist or healthcare professional for guidance.
Comedogenic Rating
Rating: 1–2 out of 5
Di-C16-18 Alkyl Dimer Dilinoleate is an ester based on long-chain fatty alcohols and a dimerized form of linoleic acid. Its large molecular size means it sits mainly on the surface instead of settling deep into pores, so it has a low tendency to clog them. It is lighter than traditional butters and waxes yet not as volatile as silicones, which places it in the lower-middle of the comedogenic scale.
Most people, including those prone to breakouts, tolerate it well when it is used at standard levels in leave-on products.
Keep in mind that a formula’s overall oil load, plus individual skin factors such as sebum output and exfoliation habits, can raise or lower the real-world risk of congestion.
Summary
Di-C16-18 Alkyl Dimer Dilinoleate works primarily as a skin-conditioning emollient. By forming a soft, lightweight film rich in fatty acids it reinforces the skin barrier, traps water and gives creams, balms and masks a cushiony glide. The ingredient is appreciated for its plant origin, pleasant skin feel and oxidative stability which help explain why it appears in a growing number of moisturizers, lip products and after-sun formulas even though it is still less common than classic oils like jojoba or mineral oil.
Current safety assessments show it to be low-risk, non-sensitizing and non-photoactive, so most users can incorporate it into daily routines with confidence. As with any new skincare ingredient it is wise to perform a quick patch test before full use, especially if you have highly reactive or acne-prone skin.