Trisodium hexafluoroaluminate Chemical Properties

Melting point:

1000°C

Density 

2.9 g/mL at 25 °C (lit.)

refractive index 

1.338

solubility 

insoluble in H2O

form 

Crystals

Specific Gravity

2.9

color 

White

Water Solubility 

Sparingly soluble in water(0.602 g/L at 20°C).

Merck 

14,2606

Solubility Product Constant (Ksp)

pKsp: 9.39

InChI

InChI=1S/Al.6FH.3Na/h;6*1H;;;/q+3;;;;;;;3*+1/p-6

InChIKey

REHXRBDMVPYGJX-UHFFFAOYSA-H

SMILES

[Al-3](F)(F)(F)(F)(F)F.[Na+].[Na+].[Na+]

CAS DataBase Reference

13775-53-6(CAS DataBase Reference)

EPA Substance Registry System

Aluminate(3-), hexafluoro-, trisodium, (OC-6-11)- (13775-53-6)

Safety Information

Hazard Codes 

T,N

Risk Statements 

20/22-48/23/25-51/53-20

Safety Statements 

22-37-45-61

RIDADR 

UN 3077 9/PG 3

WGK Germany 

1

RTECS 

BD0075000

TSCA 

TSCA listed

HazardClass 

8

PackingGroup 

III

Storage Class

6.1D - Non-combustible acute toxic Cat.3
toxic hazardous materials or hazardous materials causing chronic effects

Hazard Classifications

Acute Tox. 4 Inhalation
Aquatic Chronic 2
Lact.
STOT RE 1 Oral

MSDS

• Language:English Provider:Trisodium hexafluoroaluminate
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Trisodium hexafluoroaluminate Usage And Synthesis

Chemical Properties

Sodium aluminum fluoride (Cryolite) is a snow-white crystalline solid, powder or vitreous mass. The crystalline solid (natural product (cryolite) may be colored reddish or brown or even black but loses this discoloration on heating); synthetic product is an amorphous powder. Odorless

Uses

Sodium aluminum hexafluoride is used as a solvent (or flux) for electrolysis aluminum oxides such as bauxite, whitener for enamels and an opacifier for glass and in the industrial production of aluminum.

Definition

A compound found in large quantities in South Greenland. It is white or colorless, but may be reddish or brown because of impurities. Sodium hexafluoroaluminate is used as a flux in the manufacture of aluminum. It crystallizes in the monoclinic system but in forms that closely resemble cubes and isometric octahedrals.

Application

Recycling and treatment of fluorine-containing waste are required for environmental protection and to utilize the fluorine resources. Because of decreases in fluorite reserves and inefficient fluorine resource recovery, cryolite has become a potential resource for fluorine recovery^[1].

References

[1] Cao, X., Peng, J., Dong, W., Li, Y., Wang, Y., & Di, Y. (2024). Review on the Preparation of Cryolite from Industry Waste Containing Fluorine. Journal of Sustainable Metallurgy, 21 1. https://doi.org/10.1007/s40831-024-00835-0

Flammability and Explosibility

Non flammable

reaction suitability

reagent type: catalyst
core: aluminum

Potential Exposure

Sodium aluminum fluoride (Cryolite) is used in making pesticides, ceramics, glass, and polishes; in refining reduction of aluminum, flux, glass, and enamel.

Shipping

UN3077 Environmentally hazardous substances, solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required.

Incompatibilities

Incompatible with strong acids such as sulfuric, strong oxidizers, hydrogen fluoride.

Waste Disposal

In accordance with 40CFR 165 recommendations for the disposal of pesticides and pesticide containers. Must be disposed properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office.

Trisodium hexafluoroaluminate(13775-53-6)Related Product Information

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• TETRAKIS(ACETONITRILE)COPPER (I) HEXAFLUOROPHOSPHATE
• Aluminum sodium fluoride
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