Magnesium hexafluorosilicate hexahydrate

Magnesium Hexafluorosilicate Hexahydrate (CAS 18972-56-0, EC 606-187-0) is an inorganic fluorosilicate salt also known as magnesium fluosilicate, magnesium silicofluoride, and fluosilicate de magnesium. It carries no E-code designation and is not approved for food use. The compound is supplied as a white crystalline powder under HS code 28269080.

In concrete hardening and surface treatment, it reacts with free calcium hydroxide in cement matrices to form insoluble calcium fluoride and silica gel, densifying the surface and reducing porosity. In textile and paper processing, it functions as a preservative and surface-modifying agent, inhibiting microbial growth while improving substrate resistance to moisture and biological degradation.

This product is available in technical grade and is subject to REACH registration requirements within the European Economic Area. Standard packaging formats include 25 kg bags and bulk quantities. Buyers should confirm compliance documentation and SDS availability with the supplier prior to procurement.