| Characteristics | Unit | Standard Request | Test Method |
| Appearance | White granular powder | HG/T 2770-2008 | |
| Nitrogen (as N) | %(w/w) | 24 Min | HG/T 2770-2008 |
| P 2 O 5 | %(w/w) | 45 Min | HG/T 2770-2008 |
| Moisture | %(w/w) | 0.1 Max | HG/T 2770-2008 |
| pH value (1% aqueous solution) | 6.8-8.4 | HG/T 2770-2008 | |
| Solubility (60 O C) g/100ml water | %(w/w) | 100 Min | HG/T 2770-2008 |
| Polymerization degree | 60 Max | HG/T 2770-2008 |