Diethylamino Hydroxybenzoyl Hexyl Benzoate is a next-generation, oil-soluble chemical sunscreen filter designed for high UVA protection and exceptional photostability. It effectively neutralizes long-wave UVA radiation, which is primarily responsible for photoaging and DNA damage within the deeper layers of the dermis.
- INCI Name:
- Diethylamino Hydroxybenzoyl Hexyl Benzoate
- Chemical/Scientific Name:
- Hexyl 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoate
- Common Aliases:
- DHHB, Uvinul A Plus
| Category: | Sun Protection |
| Source Origin: | Synthetic |
| Comedogenic Rating: | 0 |
| Primary Industries: | Cosmetic, Dermatological Care |
| Solubility: | Oil-soluble |
At a Glance: Properties & Effects
| Anti-Aging/Renewal: | |
| Formula Stability: | |
| Irritation Risk: |
- Primary Benefits: Superior UVA II and UVA I absorption, prevention of photoaging, high photostability, and low skin penetration.
- Potential Risks: Rare cases of contact dermatitis, though it is significantly less sensitizing than older organic filters.
Biological Action & Cosmetic Profile
Radiation in the UVA spectrum (320–400 nm) penetrates the skin more deeply than UVB, reaching the dermis where it generates reactive oxygen species (ROS). These free radicals degrade collagen and elastin fibers, leading to visible signs of aging such as wrinkles and loss of elasticity. Diethylamino Hydroxybenzoyl Hexyl Benzoate functions as a chemical filter by absorbing these UVA rays and converting the energy into harmless heat, thereby protecting the underlying skin structure.
Photostability represents the defining advantage of this molecule over older UVA filters like Butyl Methoxydibenzoylmethane. While some filters degrade quickly upon exposure to sunlight, this benzoate derivative maintains its structural integrity and protective capacity throughout the duration of sun exposure. This stability ensures that the sunscreen remains effective without the need for constant re-stabilization by other ingredients.
Regarding formulation chemistry, the ingredient is a pale yellow to salmon-colored powder that dissolves readily in cosmetic oils and esters such as C12 15 Alkyl Benzoate. Its large molecular weight reduces the risk of systemic absorption through the skin barrier, a common concern with older organic filters. This characteristic contributes to its high safety profile and excellent skin compatibility, even for sensitive complexions.
Broader Applications & Origins
Sunscreen technology relies on this ingredient primarily for high-SPF and PA++++ rated products. Beyond standard sunscreens, manufacturers integrate it into daily moisturizers and anti-aging creams to provide continuous protection against incidental UV exposure. The molecule was specifically engineered to fill the gap in UVA protection that existed before the development of modern, stable broad-spectrum filters.
Routine Integration
- Synergies: High compatibility with UVB filters like Ethylhexyl Triazone and Octocrylene. It is frequently paired with Ethylhexyl Methoxycinnamate to provide comprehensive broad-spectrum coverage. Inorganic filters such as Zinc Oxide and Titanium Dioxide also work well alongside it to enhance the overall SPF rating.
- Conflicts: No significant chemical conflicts known in standard cosmetic formulations.
Clinical Consensus & Safety
Safety profiles derived from the European Scientific Committee on Consumer Safety (SCCS) confirm that Diethylamino Hydroxybenzoyl Hexyl Benzoate is safe for use in cosmetic products at concentrations up to 10%. Extensive dermatological testing has shown a very low potential for skin irritation or sensitization. Furthermore, clinical studies indicate it does not exhibit estrogenic effects, addressing common consumer concerns regarding endocrine disruption associated with certain older chemical filters.
Is Diethylamino Hydroxybenzoyl Hexyl Benzoate “reef safe”?
Current research suggests that this ingredient does not share the same coral toxicity concerns as oxybenzone or octinoxate. While “reef safe” is not a legally regulated term, it is generally considered a more environmentally friendly option for modern sunscreen formulations.
Does it protect against both UVA and UVB rays?
This specific ingredient is a specialized UVA filter. While it offers excellent protection against the rays that cause aging and long-term damage, it must be combined with UVB filters to provide full broad-spectrum protection against sunburn.
Is this ingredient approved for use in the United States?
As of current FDA regulations, this ingredient is not yet included in the approved OTC Sunscreen Monograph in the US, despite its widespread use and approval in Europe, Asia, and Australia. It is commonly found in “imported” or “international” sunscreen versions.