Herein described is a novel crystalline form of the hydrochloride of the (4- hydroxycarbamoyl-pheny3)-carbamic acid (6-dimethylamino methyl-2- naphtalenyl) ester. In particular, herein described is a polymorph of the hydrochloride of the (4- hydroxycarbamoyl-phenyl)-carbamic acid (6-dimethylamino methyl-2- naphtalenyl) ester, characterized by a Powder X Ray Diffraction spectrum as indicated in Figure 1, and/or by a DSC profile as indicated in figure 2, and/or by a TGA profile as indicated in figure 3 and/or by an IR spectrum as indicated in figure 4.La présente invention concerne une nouvelle forme cristalline du chlorhydrate de lester de (6-diméthylamino-méthyl-2-naphtalényle) de lacide (4-hydroxycarbamoyl-phényl)-carbamique. En particulier, linvention concerne un polymorphe du chlorhydrate de lester de (6-diméthylamino- méthyl-2-naphtalényle) de lacide (4-hydroxycarbamoyl-phényl)-carbamique, caractérisé par un spectre de diffraction des rayons X sur poudre tel quillustré sur la figure 1 et/ou un profil de DSC tel quillustré sur la figure 2 et/ou un profil de TGA tel quillustré sur la figure 3 et/ou un spectre IR tel quillustré sur la figure 4.
