White amorphous powder, insoluble in water, insoluble in acid and lye, eutectic with alkali to obtain metastannate, and loses water significantly when heated.
Metastannic acid is mainly used as a flame retardant for chemical fibers and textiles, plastic products, paint coatings and epoxy resin sealing materials; colorants for ceramic products; additives for printing inks; mordant in the textile industry.
Metastannic acid can be obtained by reacting refined tin with concentrated nitric acid, separating by filtration and drying.
