The present invention relates to a novel salt of perindopril, namely the paratoluene sulfonic acid salt. The present invention also relates to an amorphous form of the perindopril paratoluene sulfonic acid salt. The invention further relates to processes for the preparation of the novel salt and the amorphous form thereof. The invention also relates to pharmaceutical compositions comprising the perindopril tosylate for the treatment of hypertension and heart failure.