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HEXYLETHYLIDENEAMINO-BENZOATE.

Valuable CAS 72968-69-5 / PERFUMING

HEXYLETHYLIDENEAMINO-BENZOATE, more commonly recognized as Diethylamino Hydroxybenzoyl Hexyl Benzoate (DHHB), is a highly effective organic UVA filter. It delivers robust, broad-spectrum UVA protection from 320 to 400 nm, peaking at 354 nm, thereby guarding skin against photoaging and potential cellular damage. This ingredient additionally offers antioxidant and anti-inflammatory benefits, distinguished by a favorable safety profile and minimal irritation potential.

Summary

sunscreen uv filter uv absorber light stabilizer

Science

Mechanism of Action

Diethylamino Hydroxybenzoyl Hexyl Benzoate (DHHB) operates as an organic UV filter primarily by absorbing ultraviolet A (UVA) radiation across the 320-400 nm range, with a precise peak absorption at 354 nm. This absorbed energy is efficiently converted into thermal energy, establishing an imperceptible protective barrier within the superficial skin layers. Furthermore, DHHB provides potent antioxidant defense through the neutralization of UV-induced free radicals, and in preclinical in vitro studies, it has demonstrated an anti-inflammatory effect by inhibiting edema formation.

Research

Clinical Evidence

Medium confidence
Effective range N/A
Optimal

10%

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Diethylamino Hydroxybenzoyl Hexyl Benzoate (DHHB) exhibits excellent photostability, ensuring its chemical integrity and functional performance are maintained under UV exposure without significant degradation. As an oil-soluble filter, it integrates smoothly into the oil phase of emulsion-based formulations. It is compatible with other UV absorbers, contributing to formulation stability and extending product shelf-life by preventing light-induced deterioration. DHHB is known for its non-greasy, light texture and does not leave a white residue.

Synergies

  • Compatible with other UV absorbers

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
10%
Sensitization risk Low

The Scientific Committee on Consumer Products (SCCP) and its successor, the SCCS, deemed Diethylamino Hydroxybenzoyl Hexyl Benzoate (DHHB) safe for use as a UV filter in cosmetic products at concentrations up to 10% in the EU, a limit that remains current. In the United States, DHHB is not approved as an active sunscreen ingredient under FDA regulations for over-the-counter drugs; however, it is permissible for cosmetic product protection as a light stabilizer. Concerns regarding potential di-n-hexyl phthalate (DnHexP) contamination led the SCCS to recommend a maximal level of 1 ppm for this unavoidable trace impurity. Overall, DHHB is considered safe for cosmetic application, presenting a low probability of skin irritation or allergic reactions.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Diethylamino Hydroxybenzoyl Hexyl Benzoate (DHHB) is a highly valuable, photostable organic UVA filter providing excellent protection against photoaging and free radical damage, characterized by broad skin compatibility and a low irritation profile.

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