Name | Zinc silicofluoride |
Synonyms | Zinc silicofluoride Zinc hexafluorosilicate ZINC SILICOFLUORIDE HEXAHYDRATE Zinc hexafluorosilicate hydrate |
CAS | 18433-42-6 |
EINECS | 689-379-7 |
Molecular Formula | F6H12O6SiZn |
Molar Mass | 315.56 |
Density | 2.104 |
Appearance | solid |
Merck | 13,10191 |
Physical and Chemical Properties | Chemical properties colorless hexagonal prismatic crystal or white crystalline powder. Soluble in water, soluble in inorganic acid, insoluble in ethanol. |
Use | Uses Used as concrete rapid hardener, wood preservative, plaster of Paris reinforcement, post-washing treatment agent, catalyst for polyester fiber, etc. |
Hazard Symbols | C - Corrosive![]() |
Risk Codes | R22 - Harmful if swallowed R34 - Causes burns |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S24/25 - Avoid contact with skin and eyes. S13 - Keep away from food, drink and animal foodstuffs. |
UN IDs | UN 2855 6.1/PG 3 |
WGK Germany | 3 |
Downstream Products | ZINC SILICOFLUORIDE |
neutralization method: fluorosilicic acid solution (see fluorosilicic acid) is prepared by the reaction of sulfuric acid, fluorite and silica sand, and then lead salt (lead fluorosilicate or lead carbonate) is used for purification to remove sulfate. Then it is neutralized with zinc oxide, then filtered, evaporated (to saturated solution), cooled and crystallized, centrifuged and dried to obtain zinc fluorosilicate. The reaction formula is as follows:
H 2 SiF 6 ZnO→ZnSiF 6 H 2 O