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Yttrium oxide, also known as yttria, is Y2O3. It is an air-stable, white solid substance. Yttrium oxide is used as a common starting material for both materials science as well as inorganic compounds.
Y 1237 (OTTO) Yttrium oxide, GR 99.9% Cas no 1314-36-9 - used in the manufacturing of neodymium Nd:YAG lasers and in components of MOS and LED transistors.