diethylamino hydroxybenzoyl hexyl benzoate diethylamino hydroxybenzoyl hexyl benzoate diethylamino hydroxybenzoyl hexyl benzoate (inci) is an organic compound used in sunscreens to absorb uva radiation. it is marketed as parsol dhhb by dsm and as uvinul a plus by basf. dhhb has an absorption maximum of 354 nm. diethylamino hydroxybenzoyl hexyl benzoate names preferred iupac name hexyl 2-benzoate other names uvinul a plus identifiers cas number 302776-68-7 y 3d model (jsmol) interactive image chemspider 8286957 y echa infocard 100.103.916 pubchem cid 10111431 unii anq870jd20 comptox dashboard (epa) dtxsid60184370 inchi inchi=1s/c24h31no4/c1-4-7-8-11-16-29-24(28)20-13-10-9-12-19(20)23(27)21-15-14-18(17-22(21)26)25(5-2)6-3/h9-10,12-15,17,26h,4-8,11,16h2,1-3h3 ykey: fdatwrluyrhcje-uhfffaoysa-n yinchi=1/c24h31no4/c1-4-7-8-11-16-29-24(28)20-13-10-9-12-19(20)23(27)21-15-14-18(17-22(21)26)25(5-2)6-3/h9-10,12-15,17,26h,4-8,11,16h2,1-3h3key: fdatwrluyrhcje-uhfffaoyar smiles ccccccoc(=o)c1=cc=cc=c1c(=o)c2=c(c(=cc=c2)n(cc)cc)o properties chemical formula c24h31no4 molar mass 397.515 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). y verify (what is yn ?) infobox references dhhb has excellent photostability and compatibility with other uv absorbers and other cosmetic ingredients. dhhb has been approved for the use in sunscreens in the european union since 2005 with a maximum of 10 per cent and is also approved in south america, mexico, japan and taiwan. in the united states it can be used for product protection.