Avaliação das estabilidades físico-química e microbiológica de uma loção fotoprotetora

Abstract

Brazil is internationally recognized for its joy and tropicality, these characteristics being associated, in part, with the high temperatures distributed throughout the territory. At this point, the levels of solar radiation incident in the country require a lot of attention from the children, young, adult and elderly populations. In spite of the numerous benefits provided by the sun, it is necessary to pay attention to the exaggerated moments of photo exposure, since the damages caused by ultraviolet radiation can have serious health consequences. Thus, the presence of an effective and safe photoprotective formula prevents these possible damages to the skin. The objective of this study was to evaluate the physical-chemical and microbiological stability of a photoprotective lotion produced by the Farmácia Escola of the Universidade Federal do Ceará. This study of the parameters of stability in cosmetics lasted 60 days, and the analyses were performed after 24 hours, followed by 05, 10, 15, 30, 45 and 60 days post-production, being stored in plastic packages. The formulations were divided into two (2) groups for the storage conditions of the finished product, one being submitted to room temperature and the other to the oven at 40ºC. Both groups were submitted to the sensorial analysis, verifying the appearance, the color, and the odor; pH, weight, viscosity, spreadability and microbiological evaluation. In the study of the preliminary stability, the photoprotective lotion presented instability before the centrifugation test, with the presence of precipitate. Samples submitted to room temperature did not immediately exhibit nonconformities regarding the color, odor, and appearance of the formulation. The pH at 60 days was 5.3, there was little change in weight and no sample had microbiological contamination. It was also observed the increase in viscosity and, consequently, a decrease in the spreadability of both groups. Even the formulation presenting some specific aspects, there will be a need to continue stability studies on the formulation.