Standard: USP 28, USP 27

Specific Rotation:            +158° ~ +165°                
Loss on drying:                 0.5% Max               
Residue on ignition:                 0.5% Max                      
Clarity of solution:                    Clear                         
Relative Materials:              
Single:                                1.0% Max                    
Total impurities:                   1.5% Max               
Assay:                          97.0% ~ 103.0%