Influence of the incorporation of annatto oil bixa orellana l. in the sun protection factor by visible spectroscopy of photoprotective formulations

The cancer of skin type no melanoma is the most frequent cancer in Brazil and accounts for 25% of all malignant tumors registered in the country. It has high rates of cure if detected early. Among the tumors of the skin, non-melanoma type is the higher incidence and lower mortality. Test bioproducts with protective solar activity is crucial in the prevention of public health and promotes technological development. The study evaluated the influence of Bixa orellana L. oil on SPF (Sun Protection Factor) six emulsions containing chemical filters Eusolex 232 and Neo Heliopan MBC. The physicochemical analysis of oil (acid value and saponification) preceded the spectrophotometric reading tests of each formulation. Then, centrifuge tests and thermal stress were performed and preceded the accelerated stability study (2 months) in the refrigerator (10°C), environment temperature (32°C) and oven (40°C) with three formulations. Acidity and saponification indices showed values slightly above those permitted. The spectrophotometric analysis showed that the oil enhances the effect of solar protection of Eusolex 232 chemical filters and Neo Heliopan MBC. The pH test showed satisfactory results for formulations containing the chemical filter Neo Heliopan MBC®. The spin test showed satisfactory results for 7 of the 9 formulations. The thermal stress test showed positive results only for three of the nine formulations. The SPF analysis has verified that the oil annatto of Bixa Orellana L. 5% and 10% when incorporated in photoprotective formulations with chemical filters Eusolex 232® and Neo Heliopan MBC® potentiates the effect of solar protection.