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Executive standard:Q/SWYF001-2011
Item
Index
Ammonium fluoride contentw/％ ≥
95.0
Free acid (HF) w/% ≤
1.0
Fluosilicate[ (NH4) 2SiF6] w/% ≤
0.2
Sulfatew/% ≤
Moisture w/% ≤
4.0
Iron Few/% ≤
0.01
Heavy metal (Pb) w/% ≤
0.001
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