Potassium aluminium fluoride

Potassium aluminium fluoride

Names
IUPAC name potassium tetrafluoridoaluminate
Other names potassium tetrafluoroaluminate
Identifiers
CAS Number	14484-69-6 Y
EC Number	238-485-8
Properties
Chemical formula	KAlF4
Molar mass	142
Appearance	White solid
Density	2.9 g/cm3
Melting point	> 600 °C (1,112 °F; 873 K)
Solubility in water	2 g/L
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Potassium aluminium fluoride (KAlF₄) is an inorganic compound.

This compound is used as flux in the smelting of secondary aluminium, to reduce or remove the magnesium content of the melt. The main environmental issue that arises from using PAF is the production of fluoride gases. Calcium hydroxide is widely used to suppress the fluorides produced but in most cases fails to remove it sufficiently.

PAF is also present in a wide range of products for the metals industry as a fluxing agent within additives to help its dispersion within a charge.

It is also used as an insecticide.