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Ammonium Fluorosilicate

【Molecular formula】: (NH4)2SiF6
【Molecular weight】: 178.14
【Properties】: Colorless crystalline powder, soluble in alcohol and water. There are two kinds of
crystals : α and β. Density of α:2.011g/cm2, density of β:2.152g/cm2.
【Uses】: Used as moth proofing agent, disinfector in brewing industry, glass etchant, moth proof for textiles, light metal casting. Also used in artificial cryolite and producing ammonium chlorate etc..
【Quality Index】:
Index name
standard
Ammonium fluosilicate[(NH4)2SiF6] ≥,% 
98
Sulfate (SO4) ≤, %
0.3
Fluosilicic acid (H2SiF6) ≤, %
0.6 
Water content  ≤, %
0.6
Insoluble substance in water ≤, %
0.5   
Appearance     
White crystal