White to off-white powder

    
        
            
            
Items
            
            
            
Standard
            
        
        
            
            
Appearance
            
            
            
White to off-white powder
            
        
        
            
            
Specific Rotation [20/D]
            
(C=2 in C2H5OH)
            
            
            
+22 to +26º
            
        
        
            
            
Melting point 
            
            
            
187-190℃
            
        
        
            
            
Heavy Metals (Pb)
            
            
            
Not more than 20 PPM
            
        
        
            
            
Arsenic (As2O3)
            
            
            
Not more than 2 PPM
            
        
        
            
            
Loss on Drying
            
            
            
Not more than 0.50%
            
        
        
            
            
Residue on Ignition
            
            
            
Not more than 0.3%
            
        
        
            
            
Assay
            
            
            
97.5% to 102.5%