【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