The present invention relates to 3-(1-{3-[5-(1-methyl-piperidin-4-ylmethoxy)-pyrimidin-2-yl]-benzyl}-6-oxo-1,6-dihydro-pyridazin-3-yl)-benzonitrile hydrochloride solvates and crystalline modifications thereof. The present invention further relates to processes of manufacturing these crystalline modifications as well as their use in the treatment and/or prophylaxis of physiological and/or pathophysiological conditions, which are caused, mediated and/or propagated by the inhibition, regulation and/or modulation of signal transduction of kinases, in particular by the inhibition of tyrosine kinases, e.g. pathophysiological conditions such as cancer.本發明係關於一種3-(1-{3-[5-(1-甲基-六氫吡啶-4-基甲氧基)-嘧啶-2-基]-苄基}-6-酮基-1,6-二氫-噠嗪-3-基)-苯甲腈氫氯酸鹽溶劑合物及其結晶變體。本發明進一步係關於製備該等結晶變體之方法及其在治療及/或預防生理學及/或病理生理學病狀中之用途,該等病狀係由激酶信號轉導之抑制、調控及/或調節(尤其由酪胺酸激酶之抑制)所導致、介導及/或傳播,例如病理生理學病狀,如:癌症。