Potassium Fluoborate (Potassium Tetrafluoborate)
[Molecular Formula] KBF4
[Molecular Weight] 125.91
[Properties]
white powder or gelatinous crystal, no hygroscopicity, bitter odor; to form hexahedral prismatic crystal if crystallizing from aqueous solution; specific gravity: 2.50, melting point: 530°C, slight soluble in water and heat alcohol, insoluble in cold alcohol, begin to decompose when melting, can be decomposed to boron trifluoride by strong acid like sulfuric acid, to produce fluoride and borate when melting together with alkali metal carbonate, toxic.
[Uses]
It is used as flux in hot weld and copper weld, as material to produce alloy containing boron by aluminum-magnesium casting, as stuffing in heavy-type grind stone using resin as adhesive of grind material; It can defecate the light metal residue in welding and fusing silver, gold and stainless steel. It is also used to produce boron trifluoride and other fluoride, used in electrochemical process and as reagent.
[Quality Index] Enterprise Standard(ES)
Item |
Excellent Grade |
First Grade |
Item |
Excellent Grade |
First Grade |
KBF4, % ≥ |
98.0 |
95.0 |
Chloride(Cl), % ≤ |
0.25 |
0.50 |
Phosphate(PO4),%≤ |
0.01 |
0.02 |
Sulfate(SO4),% ≤ |
0.10 |
0.15 |
Iron(Fe), %≤ |
0.005 |
0.008 |
Silicate(SiO2),% ≤ |
0.01 |
0.02 |
Heavy Metal(Pb), %≤ |
0.10 |
0.15 |
K2SiF6, %≤ |
qualified |
qualified |
[Package] woven bag lined with polyethylene plastic bag, net weight: 25kg/bag
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