DHHB in sunscreen: a UVA filter, not a protection score

Quick answer

DHHB is a UVA filter. “Uvinul A Plus” is a trade name you may see in product education; the ingredient declaration usually uses Diethylamino Hydroxybenzoyl Hexyl Benzoate.

DHHB answers one part of the wavelength question

DHHB can contribute UVA absorption. A finished broad-spectrum system also needs appropriate coverage elsewhere, including UVB. The full filter system and the tested result are therefore more useful than counting one fashionable filter.

Trade name and INCI are not interchangeable labels

Trade names describe supplied commercial materials; consumer ingredient lists use standard cosmetic names. “Uvinul A Plus” can help recognition, but it should not be silently substituted into a declaration or treated as a separate ingredient.

Regulation is market-specific

The EU lists DHHB in Annex VI under stated concentration conditions. ^{EU Annex VI} This establishes European context only. It does not prove the status, concentration or authenticity of an Indian product.

What we could not verify

DHHB’s presence does not reveal the exact UVA-PF, filter concentrations, photostability of the complete system, wear or suitability for sensitive eyes.

Bottom line

Use DHHB to recognise a UVA strategy. Use finished-product testing to judge the protection claim.