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ADD.: Rm 1013,BLDG 3,Area C,Hankou City Plaza,Houhu Avenue,Wuhan
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
| ITEMS | STANDARD |
| Appearance | White crystals or crystalline powder |
| Assay | 99.0% min |
| Specific Rotation | -1.6 o --- -2.6 o |
| Residue on ignition | 0.05% max |
| Chloride | 0.004% max |
| Sulphate | 0.02% max |
| State of solution | clarification |
| Readily oxidizable substance | Qualified |
| Fumaric Acid | 1.0% max |
| Maleic Acid | 0.05% max |
| Heavy metals(as Pb) | 20 ppm max |
| Arsenic(As) | 2 ppm max |
