6--Chloropurine [ 87-42-3 ]
 
                | Description | Light yellow or yellow crystalline powder | 
| Loss on drying | ≤0.5% | 
| Residue on ignition | ≤0.1% | 
| Heavy metals | ≤20ppm | 
| Assay(HPLC) | ≥99.0% | 
| Packing | 25kg/barrel | 
| Storage | Keep dry, stable at room temperature. |