Pharmaceutical salt of 1-cyclopropyl-8-methyl-7- [5-methyl-6- (methylamino) -3-pyridinyl] -4-oxo-1,4-dihydro-3-quinolinecarboxylic acid, which is hydrochloride hydrate which has a solubility of>; = 0.050 mg / mL of water.Sal farmacéutica del ácido 1-ciclopropil-8-metil-7-[5-metil-6-(metilamino)-3-piridinil]-4-oxo-1,4-dihidro-3-quinolincarboxílico, que es el hidrato de clorhidrato que tiene una solubilidad de >;= 0,050 mg/mL de agua.