White or pale gray powder; slightly soluble in water; hydrogen fluoride released in the reaction to the above; dissolved slowly in strong acid to release Hydroxide Fluoride. Melting point: 570 °C
Specification(%):
KAlF4
98%min
Cl
0.05%max
Fe
0.05%max
SO4
0.05%max
Pb
0.01max
Al
17.25-19%
F
50-55%
Application:
Soldering flux for Aluminum and its alloy; flux in glass and ceramic industries.