#$%^&*AU2013200937A120130314.pdf#####POLYMORPHIC FORMS OF BOSENTAN ABSTRACT Novel polymorphic forms of bosentan and processes for their preparation are disclosed. Further, pharmaceutical compositions comprising said polymorphicforms and the use of said 5 compositions in the treatment of patients suffering from endothelin receptor mediated disorders, for example, cardiovascular disorders such as hypertension, pulmonary hypertension, ischemia, vasospasm and angina pectoris are disclosed. [0 15