Item | Industrial-level indicators | ||
Superior I | Level I II | Secondary III | |
Trisodium phosphate(Na3PO4.12H2O)%≥ | 98.5 | 98.0 | 95.0 |
Methyl orange alkalinity% | 16.5-19.0 | 16.0-19.0 | 15.5-19.0 |
Water insoluble substance%≤ | 0.05 | 0.10 | 0.30 |
sulfate%≤ | 0.50 | 0.50 | 0.80 |
chloride%≤ | 0.30 | 0.40 | 0.50 |
Ph value | 11.5~12.5 | ||
cutter%≤ | 0.01 | 0.01 | 0.01 |
arsenic%≤ | 0.005 | 0.05 | 0.05 |