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Ammonium fluoroborate

[Name] Ammonium fluoroborate [13826-83-0] 
[Molecular formula] NH4BF4
[Molecular weight] 104.84
[Product Specifications]

Index Name Index Index Name Index
Appearance Acicular crystal Sulphate(SO4) max0.008%
Purity min98% Silicon oxide(SiO2) max0.01%
Chloride(Cl) max0.005% Heavy metals (as Pb) max0.005%
Iron(Fe) max0.005% PH of aqueous(1% solution) 3.5-5
Aqueous solution test Acceptability max Phosphate(PO4) max0.005%

[Character] It is a clear crystal or colorless acicular crystal with relative density of 1.85. It is soluble in water, insoluble in alcohol. At 16 ? 100ml water can solve 25g ammonium fluoroborate, and at 100? 97g. Its aqueous solution is weakly acidic. It decomposes when heated above 110? and sublimes when heated highly. 
[Uses] It is used as resin finishing catalyst in printing and dyeing of textile, as gas flux to provide inert atmosphere, as flux in aluminum or copper welding, as catalyst in producing sand-type resin adhesive for metal casting and precise casting of magnesium, magnesium alloy and other oxidable metal. It is also used as flame retardant and chemical reagent, etc. 
[Packing] Packing with plastic weaven bag lined with polythene plastic bag, 25kg perc bag.