The present disclosure relates to tosylate salts 1-{[4-(methoxymethyl)-4-({[(1R,2S)-2- phenylcyclopropyl]amino}methyl)piperidin-1-yl]methyl}cyclobutanecarboxylic acid, methods of preparation thereof,and intermediates in the preparation thereof, which are useful in the treatment of the LSD1-associated or mediated diseases such as cancer.