Molecular Formula

Na3AlF6

Molecular Weight

209.94

Properties

It is a colorless monoclinic crystal, but often appears off-white, pompadour, straw yellow or black due to impurities. It has relative density of 2.9-3.0, mp 1000. It is slightly soluble in water, and its aqueous is acidic. It decomposes to release poisonous HF gas while meeting sulfuric acid.

Usages

It is used as flux in aluminum smelting, cropper insecticide, flux and whiting agent of enamel glaze. It is also used in the manufacture of milky white glass, aluminum alloy and boiling steel. Its used as ingredient of grinding wheel.

Specification

Parameter

Superfine

Grade

Grade

Fluorine (F)

≥

53

53

53

Aluminum (Al)

≥

13

13

13

Sodium (Na)

≤

32

32

32

Silicon Oxide (SiO2)

≤

0.25

0.36

0.40

Ferric Oxide (Fe2O3)

≤

0.05

0.08

0.10

Sulfate (SO42-)

≤

0.7

1.2

1.3

Calcium Oxide (CaO)

≤

0.10

0.15

0.20

Phosphorus Pentoxide (P2O5)

≤

0.02

0.03

0.03

Water (H2O)

≤

0.4

0.5

0.8

Ignite on 550oC≤

≤

2.5

3.0

3.0

Packing

In 25kg/50kg plastic woven bag lined with high pressure polyethylene plastic bag.