Sodium Fluoride

Cryolite(Sodium Fluoaluminate, Aluminium Sodium Fluoride)

[Molecular Formula] Na₃AlF₆

[Molecular Weight] 209.94

[Properties]
Clorless monocrystal crystal, usually appears offwhite, pink, yellowish or black because of impurity, usually present as indiscerptible compact block with glass lustre, specific gravity: 2.9-3.0, melting point: 1000°C; slight soluble in water, aqueous solution is acidic, decompose to toxic hydrogen fluoride gas when meeting with sulfuric acid.

[Uses]
It is mainly used as fluxing agent in aluminum production, insecticide for crops, melting agent and opaquefier for enamel glaze; also used to produce opal glass and as electrolyte in producing aluminum alloy, iron alloy and boiling steel; as ingredient of grindstone and as raw material in dip coating of aluminum on iron and steel.

[Quality Index] Standard: GB 4291-84

Item	Index			Note
	Excellent Grade	First Grade	Second Grade	1. the content is based on dry base; 2. usually, the molecular ratio of NaF to AlF3 is 2 to 1; if the other requirement is needed, please declare in contract; 3. cryolite is white powder . 4. the agglomeration larger than 4mm in diameter is allowable, but the weight is not heavier than 5%.
F£¬%	53	53	53
Al, %	13	13	13
Na, %	31	31	31
SiO2+Fe2O3, %	0.25	0.4	0.5
Sulfate(SO4), %	0.88	1.2	1.5
P2O5, %	0.02	0.05	0.05
H2O,%	0.5	0.8	1.3

[Package] plastic barrel, net weight: 25kg/barrel.