| Testing Item | Standard | Result |
| Description | White or nearly white crystalline granules. | pass |
| Melting Point | 286.0-302.0 °C | 299 ºC |
| PH | 3.0-3.2 (0.05% solution at 25 ºC ) | 2.2 |
| Content | 99.5-100.5% | 99.9% |
| Maleic Acid | NMT 0.1% | NMT 0.1% |
| Lose on drying/Moisture | NMT 0.5 % | NMT 0.5 % |
| Arsenic | NMT 3 ppm | NMT 3 ppm |
| Lead | NMT 2 ppm | NMT 2 ppm |
| Mercury | <2.0 | <2.0 |
| Note: Special requirements of particle size should be negotiated by both suppliers and customers | ||