Croton urucurana Baillon, popularly known as "sangria d'água", belongs to the Euphorbiaceae family. The species has a great importance in folk medicine as antibacterial, anti-inflammatory, antiseptic, antiviral, antidiarrheal, intestinal antisecretory and cicatrizant remedies. The objective of this study was to verify the presence, in the aqueous, ethanolic and hydroalcoholic extracts, of secondary metabolites (alkaloids, anthraquinones, steroids/triterpenoids, flavonoids, glycosides, saponins and tannins), analyze the inhibition of bacteria Staphylococcus aureus ATCC 25923 and Salmonella thyphimurium ATCC 14028 growth, and evaluate the antioxidant activity by the DPPH method. Considering the phytochemical profile, the best extract was the aqueous; the bacteria susceptibility was inhibited with the ethanolic extract; and the extract with the highest antioxidant activity was the hydroalcoholic, presenting IC 50 1.3 μg/ mL. It was concluded that the extracts of Croton urucurana Baillon show interesting results and that further investigations must be carried out for the better elucidation of its benefits. Keywords:Croton urucurana Baillon; phytochemical; antioxidant; antibacterial; extract. RESUMOCroton urucurana Baillon, espécie conhecida popularmente como "sangria d'água", pertence à família Euphorbiaceae, possui grande importância na medicina popular, a qual lhe atribui propriedades antibacterianas, anti-inflamató-rias, antissépticas, antivirais, antidiarreicas, antissecretória intestinal e cicatrizante. Os objetivos deste estudo foram verificar a presença, nos extratos aquoso, etanólico e hidroalcoólico, de metabolitos secundários (alcaloides, antraquinonas, esteroides/triterpenoides, flavonoides, glicosídeos, saponinas e taninos), analisar a inibição do crescimento das bactérias Staphylococcus aureus ATCC 25923 e Salmonella thyphimurium ATCC 14028, e verificar a atividade antioxidante através do método DPPH. Para o perfil fitoquímico o melhor extrato foi o aquoso, quanto à susceptibilidade bacteriana, houve inibição com o extrato etanólico e o extrato com a maior atividade antioxidante foi o hidroalcóolico, apresentando IC 50 1,3 μg/mL. Considerando os resultados obtidos no estudo, foi possível concluir que os extratos da Croton urucurana Baillon apresentam resultados interessantes e que mais investigações devem ser realizadas para a elucidação aprimorada dos seus benefícios.
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