Gold Trioxide
Title: Gold Trioxide
CAS Registry Number: 1303-58-8
Additional Names: Auric oxide; gold sesquioxide; gold oxide
Molecular Formula: Au2O3
Molecular Weight: 441.93
Percent Composition: Au 89.14%, O 10.86%
Literature References: Prepd from the hydroxide: Roseveare, Buehner, J. Am. Chem. Soc. 49, 1221 (1927).
Properties: Brown powder; begins to evolve oxygen at 110°; at 250° it is entirely dec to metallic gold; also slowly dec by sunlight. Practically insol in water. Sol in HCl, concd HNO3 and in NaCN soln. Keep protected from light.

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