Molecule Structural Formula:
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Characteristics:
| 
             CAS. 
             | 
            
             134-47-4 
             | 
        
| 
             Appearance 
             | 
            
             off-white powder (dry) 
             | 
        
| 
             Assay 
             | 
            
             ≥80% 
             | 
        
| 
             Free acid 
             | 
            
             ≤0.2%(HPLC) 
             | 
        
| 
             Insolubles 
             | 
            
             ≤0.2% 
             | 
        
| 
             Chlorinity 
             | 
            
             ≤5% 
             | 
        
Others:
Chemical formula: C21H16O9N2S2
Molecular weight: 504.50
Uses: intermediate of Azo dyes, mainly used in the preparation of direct orange S, direct acid scarlet 4 BS, etc.