#$%^&*AU2013203470A120130502.pdf#####Documen4-12/02/2013 ABSTRACT The present invention relates to salts, polymorphs and hydrates of 2 -Amino-2-[2-(4-C2-20alky-phenyl)ethyl]propane-1,3-diol, and to the use thereof, in particular in the treatment or prevention of various autoimmune conditions.