Sodium stannate hydrate
[CAS# 12209-98-2]

Identification

• Classification: Inorganic chemical industry >> Inorganic salt >> Metal oxide acid salt
• Name: Sodium stannate hydrate
• Synonyms: disodium dioxido(oxo)tin trihydrate
• Molecular Formula: Na₂SnO₃^.3(H₂O)
• Molecular Weight: 266.71
• CAS Registry Number: 12209-98-2
• EC Number: 638-769-5
• SMILES: O.O.O.[O-][Sn](=O)[O-].[Na+].[Na+]

Properties

• Solubility: 61.3 g/100ml (water 200 ºC)
• Melting point: 140 ºC

Safety Data

• Hazard Symbols: GHS07 Warning
• Hazard Statements: H315-H319-H335
• Precautionary Statements: P261-P264-P264+P265-P271-P280-P302+P352-P304+P340-P305+P351+P338-P319-P321-P332+P317-P337+P317-P362+P364-P403+P233-P405-P501

Discovory and Applicatios

Sodium stannate hydrate, often represented as Na2Sn(OH)6·xH2O, is an inorganic compound that has garnered attention in various fields, including materials science and analytical chemistry. The discovery of sodium stannate can be traced back to early research on tin compounds, where scientists explored the properties and potential applications of different stannates. The formation of sodium stannate typically involves the reaction of sodium hydroxide with tin oxide or tin salts, leading to the synthesis of this hydrated salt.

The unique properties of sodium stannate hydrate have led to its application in several industrial processes. One notable application is in the field of metallurgy, particularly in the extraction and refining of metals. Sodium stannate acts as a reducing agent, facilitating the reduction of metal oxides to their elemental forms. This property is particularly useful in the production of tin and other metals, where sodium stannate can enhance yield and efficiency.

In addition to its role in metallurgy, sodium stannate hydrate is also employed in the production of glass and ceramics. The compound serves as a fluxing agent, lowering the melting point of silica and improving the flow characteristics of glass during processing. This application is essential for manufacturing high-quality glass products, where optimal melting and shaping properties are crucial.

Moreover, sodium stannate has found utility in analytical chemistry, particularly in the determination of certain metal ions. The compound can form stable complexes with various metals, enabling selective detection and quantification in complex mixtures. For instance, sodium stannate is often used in colorimetric assays to determine the presence of heavy metals in environmental samples. Its ability to form colored complexes aids in the visual detection and quantification of contaminants, making it a valuable tool in environmental monitoring and regulatory compliance.

Research continues to explore additional applications of sodium stannate hydrate, particularly in nanotechnology and materials science. The compound's unique properties, such as its solubility and reactivity, make it a candidate for developing advanced materials with tailored characteristics. For instance, sodium stannate can be used as a precursor for synthesizing tin oxide nanoparticles, which have potential applications in electronics, catalysis, and energy storage.

In summary, sodium stannate hydrate is a versatile compound with significant applications in metallurgy, glass manufacturing, and analytical chemistry. Its unique properties facilitate various industrial processes, enhancing efficiency and performance. Ongoing research into its properties and potential applications continues to reveal new opportunities for utilizing sodium stannate in emerging technologies.

References

2015. Facile Growth of Functional Perovskite Oxide Nanowire Arrays by Hybrid Physical-Chemical Techniques. MRS Online Proceedings Library.
DOI: 10.1557/opl.2015.89

2016. Synthesis of a hybrid zinc hydroxystannate/reduction graphene oxide as a flame retardant and smoke suppressant of epoxy resin. Journal of Thermal Analysis and Calorimetry.
DOI: 10.1007/s10973-016-5516-5

2023. Studying the Composition of Cluster Ions by Matrix- and Surface-Activated Laser Desorption/Ionization in Samples Obtained from Solutions of Sodium Stannate and Tin(II) Chloride. Protection of Metals and Physical Chemistry of Surfaces.
DOI: 10.1134/s2070205123701290