The sunscreen/cosmetic composition as defined by claim 4, said at least one hydrophilic acid compound (i) having the following formula (V): ##STR17## in which R11 is a hydrogen atom or a linear or branched alkyl or alkoxy radical having from 1 to 6 carbon atoms or an --SO3 H radical, R12 is a hydrogen atom or a linear or branched alkyl or alkoxy radical having from 1 to 6 carbon atoms, R13 is a hy