Item  | 
      Index  | 
      Index | 
Stannous fluoroborate (base on Sn2+), %  ≥  | 
      20.3  | 
      20.3  | 
    
Sn4+, %  ≤  | 
      0.8  | 
      0.8  | 
    
Iron (Fe), %  ≤  | 
      0.005  | 
      0.005  | 
    
Chloride (Cl-), %  ≤  | 
      0.005  | 
      0.005  | 
    
Sulfate (SO42-), %  ≤  | 
      0.003  | 
      0.01  | 
    
Pb2+,%≤  | 
      ----  | 
      0.005  |