Sodium tripolyphosphate (stpp) 1. Industrial grade: (1)main content(%fª):95 (2)p2o5(%fª):57.0 (3)ph of 1% water solution:9.2-10.0 (4)iron, as fe(%f_):0.015 (5)water insoluble(%f_):0.1 2. Food grade: (1)main content(%fª):95 (2)p2o5(%fª):57.0 (3)ph of 1% water solution:9.5-10.0 (4)iron, as fe(%f_):0.01 (5)water insoluble(%f_):0.05 (6)arsenic, as as(%f_):0.0003 (7)fluoride, as f(%f_):0.003 (8)heavy metal, as pb(%f_):0.001 (9)chloride, as cl(%f_):0.025 Plastic-woven sack with polythene inner bag; net weight 25kg, 50kg or 1000kg; keep away from water or moisture, do not pile up in the open air.
