| TESTING ITEMS | SPECIFICATIONS | RESULTS |
| Appearance | White to light yellow powder | Conforms |
| 2,3-HNA | ≤0.05% | <0.05% |
| 2-Naphthol | ≤0.10% | <0.10% |
| 2-Naphthalene sulfonic aicd | ≤0.002% | <0.002% |
| HNDA | ≤0.05% | <0.05% |
| 2,6-HNA Methyl ester | ≤0.10% | <0.10% |
| 1,1-Bi(2-Naphthol) | ≤0.10% | <0.10% |
| Melting point | 245℃~247℃ | 246℃ |
| Moisture | ≤0.10% | <0.10% |
| Sulfur | ≤50ppm | <50ppm |
| Insolubles | ≤50ppm | <50ppm |
| Potassium K | ≤10ppm | <10ppm |
| Sodium Na | ≤10ppm | <10ppm |
| Iron Fe | ≤10ppm | <10ppm |
| Calcium +Magnesium | ≤10ppm | <10ppm |
| Assay | ≥99.5% | 99.90% |
| Conclusion: The Product Conforms to Enterprise Standard. |
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