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| Items | Specification |
| Product Name | Sodium Acid Pyrophosphate |
| Description | White Powder or Grains |
| Assay(Na2H2P2O7 ) | 95.0% min |
| P2O5 | 63.0-64.5% |
| Water insoluble | ≤1.0% |
| Arsenic | 3ppm max |
| Fluoride | 10ppm max |
| Heavy Metal | 10ppm max |
| Ph Value(1% solution) | 3.5~4.5(1% solution) |
| Pb | 1 ppm max |
| Cd | 1 ppm max |
| Hg | 1 ppm max |
| Loss on dry | 0.5% max |
| Bulk density | 800-1150g/l |
| Ror | 40 |