Eventually settled in test tube as black (or dark brown) fine powder ppt, ~2mm; some tiny black crystals on walls; ~40 mm of clear yellow liquid.

Decanted most of the liquid from [CF1] to [CF3], leaving ~4 mm with dark ppt in [CF1].

Added 10 mm (in 10 mm diam tube) of EtOH 99% to [CF1] obtaining orangish-brown suspension.

Neither [CF1] nor [CF3] changed when hot.

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