Sodium fluoride

[Name] Zink fluoride[7783-49-5, 13986-18-0]
[Molecular formula] NaF
[Molecular weight] 41.98
[UN] 1690

[Product Specifications]
Appearance: white crystal powder
Purity: 99% min
Free base(Na₂CO₃): 0.1% max         Free acid(HF):0.1% max
Sulphate(SO₄): 0.3% max         Silicon oxide(SiO₂): 0.4% max
Moisture (H₂O): 0.5% max         Heavy metal (as Pb): 0.005% max
Water-insoluble matter: 0.3% max

[Character] It is a white crystal with relative density of 2.558, mp 993℃, bp 1695℃,. It is slightly soluble in water, insoluble in ethanol. Its aqueous solution is weak basic. It is soluble in hydrofluoric acid and produces sodium hydrogen fluoride. It has toxic.

[Uses] It is used as insecticide in agriculture, timber preservative, slagging medium of metallurgy, analyzing reagent. It is also used in welding flux of machine planer tool, sterilization of fermentation equipment, and used to manufacture fluorine compounds.

[Packing] Packing with plastic weaven bag lined with polythene plastic bag , 25kg per bag.