KND- nano tin oxide is an inorganic substance with the chemical formula SnO2. It is a white, light yellow, or light gray tetragonal, hexagonal, or rhombic crystalline powder. Melting point 1630 °C, boiling point 1800 °C. The density is 6.95 g/mL at 25 °C [1], and it is also an excellent transparent conductive material.