Stannic oxide SnO

Stannic oxide (SnO ) is a whitish powder used as a ceramic glaze and polishing agent. 

Sodium cyanide solution dissolves certain metals (I) with absorption of oxygen, e.g.. gold, silver, mercury, lead, and (2) with evolution of hydrogen, e.g.. copper, nickel, iron. zinc, aluminum, magnesium and solid sodium cyanide, when heated with certain oxides, e.g.. lead monoxide PhO. stannic oxide SnO.. yields the metal of the oxide, e.g.. lead. tin. respectively. and sodium cyanate NaCNO. Two classes of esters arc known, cyanides or nitriles, and isocyanides, isonitriles or carbylatnincs. the latter being very poisonous and of marked nauseating odor... 

Tin oxide is poorly soluble in silicate melts and it is often presented as the second most corrosion resistant refractory after chromium oxide for most silicate melts. At high temperature, however, stannic oxide (SnO ) tends to be reduced into the more soluble and more volatile stannous oxide (SnO) according with the following reaction SnC>2 = SnO + 4 O2... 

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