Sodium Desoxycholate BD Difco™ 100 g. Sodium Desoxycholate is the sodium salt of desoxycholic acid (a highly purified bile acid)and can be used in culture media in lower concentrations than in naturally occurring bile.As with other bile salts can be used as selective agents for the isolation of Gram-negativemicroorganisms, inhibiting Gram-positive organisms and spore forming bacteria.