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/%                     ≤

0.2

Moisture w/%                       ≤

4.0

Iron Few/%                       ≤

0.01

Heavy metal (Pb) w/%           ≤

0.001