Specifications:
1. Powder grade: GB1887-2007
2. Total alkali content: 99%-100.5%min
3. PH value: 8.5max
4. Heavy metal content(as Pb): 0.0005% max
5. Arsenic content(as As): 0.0001% max
6. Loss in drying: 0.2% max
7. Clearness: pass
8. Ammonium salt: pass
9. Whiteness: 85 min
10. Chloride (as Cl-): 0.1% max