Item		Best qaulity	Qualifier
Potassium Fluoride mass fraction /%≥		99.5	99.3
Chlorides(Cl) mass fraction /%       ≤		0.05	0.1
Loss on ignition/%            ≤		0.2	0.2
Free acids/alkalis mass fraction	As HF /%      ≤	0.05	0.05
	As KOH/%   ≤	0.05	0.1
Sulphate(SO4) mass fraction /%      ≤		0.1	0.2
fluosilicate silicofluoride(SiO2) mass fraction /%          ≤		0.01	0.05
Insol. in water /%               ≤		0.01	0.1
ICP Determination of KF microelements	Cr	≤5 ppm	≤5 ppm
	Cu	≤5 ppm	≤5 ppm
	Mg	≤5 ppm	≤5 ppm
	Al	≤10 ppm	≤10 ppm
	Si	≤8 ppm	≤30 ppm
	Fe	≤5 ppm	≤20 ppm
	Pb	≤10 ppm	≤10 ppm
	As	≤5 ppm	≤5 ppm
	B	≤5 ppm	≤10 ppm
	Ca	≤5 ppm	≤10ppm
	Na	≤300 ppm	≤500 ppm
	Ni	≤3 ppm	≤5 ppm
	P	≤3 ppm	≤30ppm