Diethylaminohydroxybenzoylhexylbenzoate is a high-performance, oil-soluble organic UV filter that provides robust protection against long-wave UVA radiation. Its exceptional photostability and safety profile make it a preferred alternative to older, more volatile UVA filters in modern sunscreen formulations.
- 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: | Cosmetics, Personal Care |
| Solubility: | Oil-soluble |
At a Glance: Properties & Effects
| Anti-Aging/Renewal | |
| Formula Stability | |
| Irritation Risk |
- Primary Benefits:
- Broad-spectrum UVA I and UVA II protection (peak absorption at 354 nm).
- Prevents long-term skin damage, including photoaging and hyperpigmentation.
- Maintains structural integrity under intense UV exposure without degrading.
- Functions as a stabilizer for other UV filters in the formula.
- Potential Risks:
- Not yet approved for use in the United States by the FDA (GRASE status pending).
- Requires specific oil-based solvents for proper dissolution in emulsions.
Biological Action & Cosmetic Profile
Superior defense against Ultraviolet A (UVA) radiation is the primary biological function of this molecule. While UVB rays typically cause immediate surface erythema or sunburn, UVA rays penetrate deeper into the dermis, where they generate reactive oxygen species (ROS). These radicals damage collagen fibers and elastin, leading to premature aging, fine lines, and increased risk of carcinogenesis. By absorbing these high-energy photons, the filter converts them into harmless heat energy, preventing them from interacting with biological structures.Excellent photostability distinguishes this ingredient from traditional UVA filters like Butyl Methoxydibenzoylmethane. Many organic filters lose significant efficacy within an hour of sun exposure, necessitating frequent reapplication. This hexyl benzoate derivative remains almost entirely intact even after prolonged irradiation, ensuring the SPF and UVA-PF values of a product remain consistent during use.Molecular size and lipophilicity play critical roles in its safety profile. Because the molecule is relatively large and highly lipophilic, it remains on the surface of the stratum corneum with minimal systemic absorption. This characteristic reduces the likelihood of hormonal disruption or internal toxicity, a concern often cited with older chemical filters like oxybenzone.
Broader Applications & Origins
Synthetic engineering led to the creation of this filter to address the gap in stable UVA protection. It is frequently incorporated into anti-aging day creams and daily moisturizers, not just dedicated beach sunscreens. Beyond its protective role, it serves as a technical stabilizer. In complex formulations containing Ethylhexyl Methoxycinnamate, it helps mitigate the degradation of the UVB filter, resulting in a more reliable broad-spectrum product.
Routine Integration
- Synergies:
- UVB Filters: Pairs exceptionally well with Ethylhexyl Triazone for total spectrum coverage.
- Solvents: Requires esters like C12 15 Alkyl Benzoate to prevent crystallization in the formula.
- Antioxidants: Combining with Tocopherol or Ascorbic Acid enhances protection against UV-induced oxidative stress.
- Inorganic Filters: Can be used alongside Titanium Dioxide or Zinc Oxide for hybridized, high-protection sunscreens.
- Conflicts:
- None: This ingredient is highly compatible with most cosmetic actives including Niacinamide and Glycerin.
Clinical Consensus & Safety
The Scientific Committee on Consumer Safety (SCCS) has evaluated Diethylamino Hydroxybenzoyl Hexyl Benzoate extensively, concluding that it is safe for use in cosmetic products at concentrations up to 10%. Unlike some older chemical filters, it demonstrates no evidence of estrogenic activity or photo-allergy in clinical trials. It is currently approved for use in the European Union, Australia, Japan, and most of Asia, though it remains in regulatory limbo in the United States due to the slow pace of the FDA’s sunscreen monograph updates.
Is this ingredient safe for coral reefs?
Current evidence suggests this filter is much safer for marine life than oxybenzone or octinoxate. It does not appear on the “Helios List” of chemicals known to contribute to coral bleaching, though environmental researchers continue to monitor all synthetic UV filters.
Does it leave a white cast on darker skin tones?
No. As an organic (chemical) filter, it is completely transparent upon application and does not leave the chalky residue often associated with mineral filters like Titanium Dioxide.
Is it suitable for sensitive or acne-prone skin?
Yes. It has a very low potential for skin irritation and is non-comedogenic. It is often included in formulations designed for rosacea or sensitive skin because it does not cause the “stinging” sensation associated with some other chemical sunscreen agents.