in a group of 104 non-photosensitive subjects and seventy-eight suffering from a variety of photodermatoses , the most effective protective preparation against irradiation by short uv sunburn wavelengths ( smaller than 320 nm ) was found to be a mixture of 5 % para-aminobenzoic acid and 2.5 % of the ester amyl dimethylaminobenzoate in 70 % ethanol with para-aminobenzoic acid being usually more effective than the ester , and mexenone the least effective individually .
C0038814
sunburn
C0000473
para-aminobenzoic acid