The present invention relates to crystalline forms A and B of Tigecycline hydrochloride and to methods for the preparation of the same. Furthermore the present invention relates to the use of crystalline forms A and B of Tigecycline hydrochloride as intermediates for the formulation of an anti-infective medicament. Moreover the present invention relates to pharmaceutical compositions comprising crystalline form A of Tigecycline hydrochloride in an effective amount and to the use of crystalline form A of Tigecycline hydrochloride as anti-infective medicament.
