| Characteristics | Unit | Standard Request | Test Method |
| Content (Na 2 H 2 P 2 O 7 ) | % (w/w) | 95Min | FCC |
| Water Moisture | % (w/w) | 1.0 Max | FCC |
| Arsenic(as AS) | ppm | 3 Max | FCC |
| Density | g/cm³ | 0.9-1.1 | FCC |
| Heavy Metal(as Pb) | ppm | 10 Max | FCC |
| pH value ( 1% aqueous solution ) | 3.4-4.5 | FCC |