Tin Oxide (Stannic)

Tin oxide (stannic oxide, SnO2) is a colourless or white inorganic chemical compound that occurs naturally as the mineral cassiterite, which is the primary ore used to extract tin.

Key Properties

• Chemical Formula: SnO2
• Appearance: White or off-white fine powder
• Solubility: Insoluble in water, but soluble in concentrated acids
• Nature: Thermally stable and highly refractory (withstands very high temperatures)
• Conductivity/Semiconductor: Acts as an n-type semiconductor with high optical transparency.

?Common Uses

• Ceramics and Glass: Used historically and presently as an opacifying agent to turn transparent glazes milky-white in pottery (such as maiolica and delftware).
• Polishing: Utilized as a high-polish abrasive powder for glass, steel, and precious gemstones.
• Electronics and Sensors: Employed in gas sensors, solar panels, and lithium-ion batteries. When combined with indium to form Indium Tin Oxide (ITO), it creates a transparent, electrically conductive coating used in touchscreens and flat-panel displays.
• Cosmetics: Functions as a bulking agent or mild scrubbing particle in makeup formulations.