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地址：武汉市江岸区后湖大道汉口城市广场C区3号楼1013
网址：www.zoyochem.com
| ITEM | STANDARD |
| Characteristics | White crystallized powder |
| Content >=% | 99.5 |
| Melting point | 121-124℃ |
| Loss on drying =< % | 0.5 |
| Sulfate =< % | 0.1 |
| Burnt Residue =< PPM | 300 |
| Chlorides =< % | 0.02 |
| Heavy metals(As Pb) =< PPM | 10 |
| Arsenic =<% | 0.0003 |
| Lead =< ppm | 5 |
| Mercury =< ppm | 1 |
| Oxidisable substances | Passing test |
| Carbonisable substances =< | Y5 |
| Colour of solution =< | B9 |
