::  Potassium Fluoroaluminate Potassium Fluoroaluminate   1. Molecular formula:KALF4 2. Molecular weight:142.073 3. Property:white or pale gray powder;slightly soluble in water;hydrogen fluoride released in the reaction to water at 730°C above;dissolved slowly in strong acid to release Hydrogen Fluoride 4. Melting point:570°C 5. Usage:soldering flux for Aluminium and its alloy;flux in glass and ceramic industries 6. Specificatios Content:AL ≥16% Impurity level:   Impurity name Index SO4 ≤0.05% SIO3 ≤0.2% Fe ≤0.01% Pb ≤0.005% H2O ≤1.5% 250Mesh 95% passed 6. Packing:25Kg plastic woven bag or fibre drum