Diethylhexyl Succinate is a lightweight, synthetic emollient and solvent known for its superior spreadability and non-greasy skin feel. It frequently serves as a high-performance alternative to silicones or heavier oils, offering a silky finish while enhancing the solubility of crystalline UV filters and active ingredients.
- INCI Name:
- Diethylhexyl Succinate
- Chemical/Scientific Name:
- Bis(2-ethylhexyl) butanedioate
- Common Aliases:
- Dioctyl Succinate, Di-2-ethylhexyl Succinate
| Category: | Softeners |
| Source Origin: | Synthetic |
| Comedogenic Rating: | 0-1 |
| Primary Industries: | Skincare, Suncare, Color Cosmetics |
| Solubility: | Lipophilic (Oil-soluble) |
At a Glance: Properties & Effects
| Texture Enhancement: | |
| Hydration/Moisture: | |
| Formula Stability: | |
| Irritation Risk: |
- Primary Benefits:
- Provides a “dry” emollient feel that eliminates the stickiness of heavy oils.
- Improves the application experience by allowing formulas to glide smoothly across the skin.
- Functions as an excellent pigment wetter for makeup and an efficient solvent for sunscreens.
- Potential Risks:
- Minimal risk of irritation, though hypersensitivity is possible in rare cases.
- Lacks direct biological activity, serving a primarily functional role in formulas.
Biological Action & Cosmetic Profile
Esters such as this one are created through the reaction of 2-ethylhexyl alcohol and succinic acid. Within cosmetic chemistry, it acts as a medium-to-fast-spreading emollient that sits on the skin surface to prevent transepidermal water loss. By filling the microscopic gaps between skin cells, it creates an immediate smoothing effect that enhances the visual appearance of skin texture.Solvent capabilities make this ingredient indispensable in modern sunscreens. It is highly effective at dissolving organic UV filters like Avobenzone and Benzophenone 3, which are otherwise difficult to stabilize in liquid form. Its ability to wet pigments also ensures that mineral UV filters and decorative pigments are distributed evenly without clumping.
Broader Applications & Origins
Synthetic manufacturing allows for a highly purified ingredient with consistent performance across batches. Beyond traditional lotions, it is frequently utilized in “oil-free” claims because it provides the sensory benefits of an oil without being classified as a vegetable or mineral oil. Its low viscosity and high polarity contribute to its inclusion in hair care products to add shine without weighing down the hair shaft.
Routine Integration
- Synergies:
- Works exceptionally well when paired with Dimethicone to create a breathable, velvet-like barrier.
- Enhances the skin-feel of heavy lipids like Caprylic Capric Triglyceride and Butyrospermum Parkii Butter.
- Complements Tocopherol by helping the antioxidant penetrate the upper layers of the stratum corneum more effectively.
- Conflicts:
- No known chemical conflicts with common active ingredients like retinol or vitamin C.
Clinical Consensus & Safety
Dermatological safety assessments by the Cosmetic Ingredient Review (CIR) Expert Panel have concluded that Diethylhexyl Succinate is safe for use in cosmetic formulations. It is non-sensitizing and non-irritating at the concentrations typically found in skincare, which usually range from 1% to 10%. Because of its low comedogenic potential, it is generally considered appropriate for individuals with acne-prone or oily skin types who require lightweight moisture.
Is Diethylhexyl Succinate a silicone?
No, it is a synthetic ester, not a silicone. While it provides a similar “slip” and silky feel to certain silicones, it has a different chemical structure and is often used in silicone-free formulations to achieve a high-end sensory profile.
Will this ingredient cause breakouts?
It is unlikely to cause acne for most users. With a comedogenic rating of 0-1, it is considered non-clogging and is specifically chosen for “dry-touch” products that aim to provide hydration without a greasy residue.
Why is it in my sunscreen?
Its presence in sunscreens is usually to act as a solvent. Many sun-filtering actives are powders or thick liquids that need a powerful solvent to remain evenly distributed in the formula, ensuring you receive the labeled SPF protection.