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Another Name: magnesium silicofluoride

Formulae: MgSiF6·6H2O
Molecular Weight: 274.48
UN. NO.:2853
HAZARD CLASS: 6.1
H.S. CODE: 2826.9000

CAS: 16949-65-8
Physical chemistry properties: white rhombus or acicular crystal, odorless. Its density is 1.788, the melting point is 120℃, may lose crystallize water by efflorescence, soluble in water, thin acid, insoluble alcohol thin soluble in silicofluoride. Its water solution appears acidity it can produce fluoride and silicon dioxide with alkali, poisonous. 
Usage: it can improve the hardness and strength of concrete. It is excellent harden and waterproof matter, and insecticide.
 

Specification:

MgSiF6·6H2O: 98% min

MgSO4·7H2O: 0.5% max

H2SiF6:       0.2% max

H2O:          0.6% max

Water insoluble matter  0.25% max