
| 
 NO.  | 
 ITEM  | 
 STANDARD SPECIFICATION  | 
|||
| 
 1  | 
 Arsenic ≥  | 
 5N  | 
 6N  | 
 7N  | 
|
| 
 99.999%  | 
 99.9999%  | 
 99.99999%  | 
|||
| 
 2  | 
 Impurity PPMwt Max Each  | 
 Mg  | 
 0.2  | 
 0.02  | 
 0.005  | 
| 
 Zn  | 
 0.5  | 
 0.02  | 
 0.005  | 
||
| 
 Ca  | 
 0.5  | 
 0.05  | 
 0.010  | 
||
| 
 Cu  | 
 0.5  | 
 0.01  | 
 0.002  | 
||
| 
 Cr  | 
 0.5  | 
 0.02  | 
 0.005  | 
||
| 
 Se  | 
 1.0  | 
 0.02  | 
 0.005  | 
||
| 
 Ni  | 
 0.1  | 
 0.02  | 
 0.005  | 
||
| 
 Pb  | 
 0.5  | 
 0.01  | 
 0.005  | 
||
| 
 Ag  | 
 0.1  | 
 0.01  | 
 0.005  | 
||
| 
 Al  | 
 0.5  | 
 0.02  | 
 0.005  | 
||
| 
 Fe  | 
 0.5  | 
 0.05  | 
 0.010  | 
||
| 
 Sb  | 
 0.5  | 
 0.02  | 
 0.005  | 
||
| 
 S  | 
 1.0  | 
 -  | 
 -  | 
||
| 
 Bi  | 
 0.5  | 
 0.02  | 
 0.005  | 
||
| 
 Na  | 
 0.5  | 
 0.05  | 
 0.010  | 
||
| 
 B  | 
 -  | 
 -  | 
 0.010  | 
||
| 
 K  | 
 0.5  | 
 0.02  | 
 0.010  | 
||
| 
 3  | 
Size | 
 2-10mm, 2-20mm, 3-25mm irregular lump  | 
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| 
 4  | 
 Packing  | 
 1.5kg is in Schott glass bottle, 9 bottles in carton box.  | 
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