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                    Product Name: D-Ribose 
                        CAS NO.: 50-69-1 
                        Description: 
 
Items | 
 Specification  |  
| 
 Appearance:  | 
 A white to almost white powder  |  
| 
 Specific rotation:  | 
 -19 to -21  |  
| 
 Melting point:  | 
 80-90celsius degree  |  
| 
 Loss on drying:  | 
 Not more than 0.5%  |  
| 
 Residue on ignition:  | 
 Not more than 0.1%  |  
| 
 Heavy metals:  | 
 Not more than 5ppm  |  
| 
 Arsenic:  | 
 Not more than 1ppm  |  
| 
 Assay:  | 
 Not less than 99%  |    | 
                   
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