product description
| Items | Standard |
| Appearance | White blocky crystalline or crystalline powder, allowing a little yellow and light pink. |
| Purity | ≥99.0% |
| At the beginning of melting point | ≥158.0 ℃ |
| Moisture content | ≤0.40% |
| Phenol | ≤0.20% |
| Easy carbon | Not deeper than 6 |
| Dark spot | ≤12个/20 g |
| Foreign matter | ≤5A/a |