earticle

영어

The efficacy of sunscreens is influenced by the interactions between UV absorbers and emollients.
In this study, the UV absorption spectrum behavior of UVB sunscreen filter, Ethylhexyl methoxycinnamate (EHMC), were determined in 17 emollients of varying solubility parameter (SP). Emollients were classfied into 3 groups according to SP ranges. Changes in both the wavelength of the maximum absorbance (λmax) and molar absorptivity (ε) at 308 nm were observed for EHMC-emollients groups studied. Results of observed bathochromic shift in λmax for EHMC were related to SP of emollients. Emollient groups which were showed similar results of SP were also observed a similar shift pattern for λmax for EHMC. The wavelength shifts at λmax for EHMC were found a correlation between SP of EHMC and SP of emollient groups. These results of this study should give a help to the sunscreen chemist in selecting appropriate emollients for sunscreens through prediction of the derection of wavelength shifts in the UV absorption spectrum of sunscreen chemicals using SP.