Stable salt and crystal forms of 2-[3-({1-[2-(dimethylamino)ethyl]-2-(2,2- dimethylpropyl)-1h-1,3-benzodiazol-5-yl}sulfonyl)azetidin-1-yl]ethan-1-ol

A salt of 2-[3-({1-[2-(dimethylamino)ethyl]-2-(2,2-dimethylpropyl)-1H-1,3-benzodiazol-5-yl}sulfonyl)azetidin-1-yl]ethan-1-ol with an acid, wherein the acid is selected from the group consisting of hydrochloric acid (HCl), maleic acid, and methanesulfonic acid; a crystalline form of the salt; a pharmaceutical composition comprising the salt; a pharmaceutical composition comprising the crystalline form; a method for preventing or treating a disorder or condition comprising administering the salt; and a process for preparing a pharmaceutically acceptable salt.