| ITEM | STANDARD | RESULTS |
| Appearance | white to off-white crystalline powder | Complies |
| Characteristics | UV absorption coefficient :210—227 Melting point:101—105℃ |
210 102.5—103.0℃ |
| Identification | UV: max at 221,243,305nm 10μg/ml(sample/water) HPLC: conforms to standard IR absorption: conforms to standard |
Complies Complies Complies |
| Ph | 6.0—7.5 | 7.0 |
| Related substances | Each impurity substance ≤ 0.5% Total impurity substances ≤ 1.0% |
Complies |
| Loss on drying | ≤0.5% | 0.01% |
| Residue on ignition | ≤0.1% | 0.01% |
| Heavy metals | ≤20ppm | Complies |
| Particle size | 180mesh | 91.2% |
| Assay | ≥98.5% | 99.9% |
| Conclusion | The product complies with WS1-(X-297)-2003Z standard | |
FAQ
1. What's your payment terms?
T/T or L/C.
2. What's your delivery time?
Usually we will arrange the shipment in 7 -15 days,due to different products you choose.
3. How about the packing?
Usually we provide the packing as 25 kg / bag or carton,and also as your request bag.
4. How about the validity of the products?
According to the products you ordered.
5. What documents you provide?
Usually, we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate
and Origin certificate. If your markets have any special requirements, let us know.
6. What is loading port?
Usually is Shanghai,Qingdao or Tianjin.
