1-[1-[(4-Fluorophenyl)methyl]-1H-benzimidazol-2-yl]-N-methyl-4-piperidinamine dihydrochloride

1-[1-[(4-Fluorophenyl)methyl]-1H-benzimidazol-2-yl]-N-methyl-4-piperidinamine is used as a reactant in the preparation of brain-penetrating 2-aminobenzimidazole H1-antihistamines for the treatment of insomnia. It is a Mizolastine intermediate and impurity.