| Test Item | Standard | Test Results | Test Methods | ||
| Superior Product | First-Class Product | Qualified Product | |||
| Appearance | White Crystal Powder | Qualified | Visual Inspection | ||
|
Oxalic acid
( H2C2O4.2H2O) |
≥99.6% | ≥99.0% | ≥96.0% | 99.92% | GT-B 1626-2008 |
| Sulfate (as SO4) | ≤0.07% | ≤0.10% | ≤0.20% | 0.003% | GT-B 1626-2008 |
| Burning residue | ≤0.01% | ≤0.08% | ≤0.20% | 0.003% | GT-B 1626-2008 |
| Heavy Metal (as Pb) | ≤0.0005% | ≤0.001% | ≤0.02% | 0.0005% | GB-T7532 |
| Iron (Fe) | ≤0.0005% | ≤0.0015% | ≤0.01% | 0.0002% | GT-B 1626-2008 |
| Chloride (Cl) | ≤0.0005% | ≤0.002% | ≤0.01% | 0.0005% | GT-B 1626-2008 |
| Calcium(Ca) | ≤0.0005% | 0.00003% | GT-B 1626-2008 | ||
| Conclusion: | The product was tested and determined to be Superior Product | ||||