Zinc Fluorosilicate, with the chemical formula F6SiZn

Zinc Fluorosilicate, with the chemical formula F6SiZn and a molar mass of 207.47 g/mol, is a white crystalline powder that is soluble in water and inorganic acids but insoluble in ethanol. It is characterized by a density of 2.104 g/cm³ and a specific gravity of 2.12. This compound is known for its hexagonal prismatic crystal structure and is sensitive to hydrolysis, forming stable aqueous solutions. When heated to 100°C, Zinc Fluorosilicate decomposes into silicon tetrafluoride, water, and zinc fluoride, with a pH of 3.2 for its 1% aqueous solution. It is classified as toxic and is labeled with hazard symbols indicating corrosive properties.

Zinc Fluorosilicate has a wide range of applications, including as a rapid curing agent for concrete, a wood preservative, a plaster reinforcing agent, a post-washing treatment agent, and a mothproofing agent. It is also used as a catalyst in the production of polyester fibers and in the preparation of electrolytic baths for zinc. Additionally, it serves as an active agent in mold-resistant emulsion paints and as an additive for hardening and polishing concrete surfaces. The compound can be used in cleaning stone, bricks, concrete, and other construction materials, and it plays a role in the froth-flotation process for the selection of valuable minerals.

Safety is a critical aspect when handling Zinc Fluorosilicate. It is classified under hazard class 6.1(b) and packing group III, with UN ID 2855 6.1/PG 3. The compound is harmful if swallowed and causes burns, necessitating proper protective measures such as wearing suitable protective clothing, gloves, and eye/face protection. In case of contact with eyes, it is essential to rinse immediately with plenty of water and seek medical advice. If ingested, it is crucial to seek medical help immediately and not to induce vomiting. When stored, it should be kept in a cool, dry warehouse, and the package should be marked with "drug" to indicate its hazardous nature. Disposal of Zinc Fluorosilicate must be done in accordance with applicable laws and regulations, and it should not contaminate water, foodstuffs, feed, or seed.