2. Ammonium Bifluoride ammonum hydrogen fluoride Technical standard(Grade A) Content: 98%min Residue after Ignition: 0.2% max Sulfate(based on SO4): 0.2% max Fluosilicate(Based on SiO3): 1.5% max packing: 25kg/bag 21MT/20'FCL 3. Sodium Bifluoride sodium hydrogen fluoride Technical Standard(Grade A) Content(based on NaHF2): 98.5% min Sodium Hexafluorosilicate(based on Na2SiF6): 0.5% max Moisture: 0.5 % max Water Insoluble: 0.3% max Grain(0.43um residue on sieve): 0.5 %max Packing: 25kg/bag 20MT/20'FCL 4. Ammonium Fluoride Technical Standard Content(based on NH4F): 95% min Free acid(based on HF): 1 % max Moisture: 5 % max Packing: 25 kg/bag 20MT/20'FCL