Burrup Fertilisers founder Pankaj Oswal has stepped up his criticism of the sale process of the ammonia producer, and revealed that he has a claim for US$500 million against the company, which is currently in receivership.

Burrup Fertilisers founder Pankaj Oswal has stepped up his criticism of the sale process of the ammonia producer, and revealed that he has a claim for US$500 million against the company, which is currently in receivership.