Formula  MgSiF6

Molecular     274.48

Execute standard   2853

U.N-NO     2853

Class   6.1

H.S-NO   2826.9000.9007

Properties      It is a colourless or white rhombus or acerose, odorless crystal. d 1.788.It is not easily deliquescence, but effloresce to lose crystal water. It is dehydrated at over 80℃ and gives out gas of silicon tetrafluoride. It is easily soluble in water, soluble in dilute acid, hardly soluble in hydrofluoric acid, insoluble in alcohol. Its aqueous solution appears acidity. It reacts with alkali to form corresponding fluoride and silicon dioxide. It is noxious!

Usages     It is used as hardening agent and waterproof agent for concrete to improve rigidityandintensity,in handling fluoride efflorescence of silica building, in ceramic industry. It prevents and kills off insect pests from textile. It is used as insecticide etc.

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

 

 

Item

Top Grade

MgSiF6％ ≥

98

SiO2％ ≤

0.05

H2SiF6 ％ ≤

0.2

MgSO4％ ≤

0.5

H2O％ ≤

0.6

MgF％ ≤

0.15

Others％ ≤

0.25