Uvinul A Plus (DHHB) — The EU's Most Effective UVA-I Filter
In Brief
Uvinul A Plus (DHHB) is an oil-soluble UVA-I filter covering 340–400nm — the photoaging range. Photostable and large-molecule, it is used in Korean and European sunscreens for superior long-wave UVA protection. Not FDA-approved in the US as of 2026.
What the Science Says
DHHB specifically targets UVA-I radiation (340–400nm) — the long-wave UV responsible for collagen degradation, DNA strand breaks at depth, and the photoaging effects that manifest as wrinkles and laxity rather than burns.
As an oil-soluble filter, DHHB blends into cosmetic emulsions without the grittiness or white cast of inorganic alternatives, enabling the lightweight skin-finish associated with Korean skincare.
DHHB is often combined with Tinosorb S or Uvinul T 150 to achieve full-spectrum coverage — UVB (280–315nm), UVA-II (315–340nm), and UVA-I (340–400nm) — in a single lightweight formula.
Unlike avobenzone, DHHB is inherently photostable — it does not require stabilisers like octocrylene and does not degrade into potentially sensitising byproducts.
Technical Specifications
| INCI name | Diethylamino Hydroxybenzoyl Hexyl Benzoate |
| Absorption range | 340–400nm (UVA-I targeted) |
| Peak absorption | ~354nm |
| Solubility | Oil-soluble |
| Max permitted concentration (EU) | 10% |
| Photostability | Excellent — no stabiliser required |
| FDA status (US) | Not submitted for approval |
Regulatory Status
Uvinul A Plus (DHHB) is approved in the EU at up to 10% concentration and widely used in Korean certified cosmetics. FDA submission status as of 2026: not submitted under SIA. Legal to import for personal use in the US.
Verified Products Containing Uvinul A Plus (DHHB)
Round Lab
Birch Juice Moisturizing Sunscreen SPF50+ PA++++
$22
Tinosorb S + Uvinul A Plus
Contains both Tinosorb S and Uvinul A Plus for comprehensive UVB + UVA-I + UVA-II coverage. Birch water base, no white cast.
Some By Mi
Masterpiece Nourishing Sun Serum SPF50+ PA++++
$20
Uvinul A Plus
Serum texture. Niacinamide 2% co-formulated with Uvinul A Plus for anti-ageing + UV coverage in one step.
Frequently Asked Questions
What is Uvinul A Plus and why should I care about it?
Uvinul A Plus (DHHB) is a UVA-I filter that targets the 340–400nm range — the deep UV responsible for collagen breakdown and photoaging. Most US sunscreens use avobenzone which degrades without stabilisers. DHHB is photostable and specifically effective against the UV that creates wrinkles, not just the UV that causes burns.
Which sunscreens contain Uvinul A Plus?
Uvinul A Plus is found in Korean and European sunscreens. The Round Lab Birch Juice Sunscreen and Some By Mi Masterpiece Nourishing Sun Serum are among the most widely available globally. Check ingredient lists for INCI name: Diethylamino Hydroxybenzoyl Hexyl Benzoate.