Abstract: Novel 2,8-diaminophenothiazine compounds of the following formula: and a method for preparing the same, are presented. The 2,8-diaminophenothiazine compounds are useful in the field of treating liquid or gaseous fluids, especially influents and industrial or domestic effluents.

Abstract: Novel 2,8-diaminophenothiazine compounds, a method for preparing the same, and uses of the novel 2,8-diaminophenothiazine compounds in the field of treating liquid or gaseous fluids, especially influents and industrial or domestic effluents.

Abstract: The invention concerns a diamino phenothiazine derivative, at least monosubstituted in one of its positions 1, 2, 3, 4, 5, 6, 7 or 8 and having a quinone para and ortho tautomerism, of general formula (I) or one of its salts, wherein: R1, R2, R4, R5, R6, R7, R8 and R1′, R2′, R3′, R4′ are identical or different from one another and represent: a hydrogen atom, an aliphatic and/or aromatic and/or cyclic radical, such as an alkyl group, an alkenyl group, an alkynyl group, a hydroxy group, an aryloxy group, a ketone group, an amide group, a carboxy group, a base, a non-organic radical such as a halogen atom, an alkaline-earth, a metal atom; and X is a mineral or organic anion, except for blue A, blue B, blue C, methylene green, novel methylene blue, toluidine blue derivatives. The invention is applicable in the biological and/or chemical field.