| Description | 
                                
                                    Colourless, hexagonal or needle-like crystals, or infused masses or a crystalline powder
                                 | 
	
                            
                                Identification | 
                                
                                    -
                                 | 
	
                            
                            
                                
	
                                | Identification (By IR) | 
                                
                                    Passes test
                                 | 
	
                            
                                Identification  'B' | 
                                
                                    The colour change is violet
                                 | 
	
                            
                            
                                
	
                                | Identification  'C' | 
                                
                                    When triturated with about an equal weight of camphor or chloral hydrate or phenol, the mixture liquifies
                                 | 
	
                            
                                Appearance of solution | 
                                
                                    The solution is not more opalescent than opalescence standard OS4, and not more intensely coloured than reference solution RS6
                                 | 
	
                            
                            
                                
	
                                | Acidity | 
                                
                                    Passes test
                                 | 
	
                            
                                Specific optical rotation | 
                                
                                    -51.0° to -49°.0
                                 | 
	
                            
                            
                                
	
                                | Congealing range | 
                                
                                    27.0°C to 28.0°C; on prolonged stirring the temp. rises to 30°C to 32°C
                                 | 
	
                            
                                Related substances (GC) | 
                                
                                    -
                                 |