CRYOLITE

PRODUCT IDENTIFICATION
CAS NO. 15096-52-3

CRYOLITE 
EINECS NO. 239-148-8
FORMULA AlF6Na3
MOL WT. 209.94

H.S.CODE

2826.30
TOXICITY Oral rat LD50: 5gm/kg
SYNONYMS Sodium Aluminofluoride; Sodium Hexafluoroaluminate;
Aluminum Sodium Fluoride; Kryolith; ice spar; Kryocide; Sodium Aluminum Fluoride; Sodium Fluoroaluminate; Sodium fluoaluminate; Kryolith; Natriumaluminiumfluorid; Natriumhexafluoroaluminate ; Trinatriumhexafluoroaluminat (German); Hexafluoroaluminato de trisodio (Spanish); Hexafluoroaluminate de trisodium (French);
DERIVATION  

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE pink or brown tinted granular or powder
MELTING POINT 1000 C
BOILING POINT  
SPECIFIC GRAVITY 2.95
SOLUBILITY IN WATER  
pH  
FLASH POINT  
NFPA RATINGS  
STABILITY Stable under ordinary conditions

DESCRIPTION OF CRYOLITE

Cryolite is a white or colorless mineral form of sodium aluminofluoride, which crystallizes in the monoclinic system but has a pseudocubic aspect; found in masses of waxy luster; hardness is 2.5 on Mohs scale, and specific gravity is 3.0. The powder becomes almost invisible in water due to its low refractive index. It is mined in significant quantities in Greenland ( so also known as Greenland spar; ice stone), and in small amounts in elsewhere. Synthetic cryolite is manufactured from hydrofluoric acid, sodium carbonate, and aluminium. Synthetic cryolite is used chiefly as a flux in the electrolytic production of  aluminum from bauxite as it effectively lowers down the melting point of alumina. It is used in the glass and enamel industries, in bonded abrasives as a filler, in making salts of sodium and aluminum and porcelaneous glass and in the manufacture of insecticides. Cryolite is a relatively safe fruit and vegetable insecticide. The fluoride ion inhibits many enzymes that contain iron, calcium, and magnesium. Several of these enzymes are involved in energy production in cells, as in the case of phosphatases and phosphorylases.

APPLICATIONS
solvent for bauxite in the electrolytic production of aluminum; other metallurgical applications; glass and enamel industries; filler for bonded abrasives; in the manufacture of insecticides.
SALES SPECIFICATION

APPEARANCE

pink or brown tinted granular

F CONTENT

53.0% min
Al CONTENT 12 - 15%

Na CONTENT

30 -34%
SO3 0.5% max
SiO2 0.2% max
P2O5

0.01% max
Fe2O3 0.10% max

Al2O3

1.0% max

MOISTURE

0.20% max

LOSS ON IGNITION

0.5% max
TRANSPORTATION
PACKING 25kgs, 50kgs, 1mt in Bag
HAZARD CLASS  
UN NO.  
REMARKS