The present invention relates to solid forms having a low degree of crystallinity or substantially amorphous of the hydrochloride salt of 4-[2-[[5-methyl-1-(2-naphthalenyl)-1H-pyrazol-3-yl]oxy]ethyl]morpholine (P027) and processes for their preparation.本發明係有關4-[2-[[5-甲基-1-(2-萘基)-1H-吡唑-3-基]氧基]乙基]啉鹽酸鹽(P027)的具有低結晶度或基本上非晶形的固體形式,和它們的製備方法。