| ITEM | SPECIFICATIONS |
| Preperty: | White crystalline powder |
| Content %: | >=99.0 |
| Melting Point °C: | 67-72 |
| Loss in dry,% | =<0.5 |
| Acid degree: | qualified |
| Sulfate (counted by SO42-),% | =<0.024 |
| 4-Hydroxybenzoic acid and Salicylic acid | Qualified |
| AS,%: | =<0.0003 |
| Heavy metal (count by Pb),%: | =<0.001 |
| Remain in burning % | =<0.1 |