Norwest Chemical--Food Grade|Technical Grade Norwest Chemical,Sodium Tripolyphosphate(STPP),Sodium Hexametaphosphate (SHMP),High grade Phosphoric Acid (above 85%)(PA above 85%),Yellow Phosphorus,Trisodium Phosphate (Dodecahydrate)(TSP Dodecahydr Founded in 1996 and invested by Singapore ,We ,Norwest Chemicals are not only a resource ming company with rights to explore and mine phosphate,but also a vertically-integrated manufacturer of Phosphorus and phosphorus derivatives under ISO:9001-2000 and ISO:14001 1996 standards.