[Molecular Formula] NH₄HF₂

[Molecular Weight] 57.04

[Properties] 
White needle-like crystal, easy deliquescence and agglomeration, soluble in water and slight soluble in alcohol; decompose to ammonia and ammonium bifluoride in heat water, decompose to ammonia and hydrogen fluoride when being heated, its aqueous solution is acidic and can corrode glass.

[Uses] 
It is used as etching agent for engraved glass, antiseptic agent and disinfectant, solvent in producing metal beryllium using beryllium oxide, analytic reagent and surface treating agent of silicon steel plate; also used as oxidant in producing ceramic and aluminum-magnesium alloy, cleaning agent in steam generation system of boiler's water supply system, fluorizating agent in organic synthesis, reagent in extracting rare element from electroplating solution.

[Quality Index] Enterprise Standard(ES)

Item	Excellent Grade	First Grade	Second Grade
NH3HF2, %	98	96	95
Sulfate(SO4), %	0.05	0.08	0.1
Fluorosilicate(SiF6), %	2.0	2.5	3.0
Ignition Residue %,	0.15	0.18	0.2

[Package] Plastic woven bag lined with high-pressure polyethylene plastic bag, net weight: 25kg/bag.