Product description: Ammonium Fluosilicate Formula:(NH4)2SiF6 Molecular Weight:178.15 UN. NO.:2854 HAZARD CLASS: 6.1 H.S. CODE: 2820.9000 Description: colorless crystalline powder Usage: used in brewery, glass etchant, moth repellant for textile, wood conserving agent; also used in metal casting, electroplating, extracting or producing artificial cryolite and ammonium fluoride, producing silicone catalyst. Specification: (NH4)2SiF6 ≥98% H2SiF6 ≤0.3% SO42- ≤0.6% H2O ≤0.6% Water undissolvable substance ≤0.5%