Distinct sheaves and dendrites of red needles are observed for ethcathinone and the platinic bromide reagent. The crystals could appear as tight clusters or loose large sheaves. Both habits are bright under crossed polars. With time (10 minutes), the crystal growth covers the entire drop even at amounts lower than 20 μg.
The abundant crystal growth makes this test suitable for IR spectroscopy. Information rich spectra that have spectral features consistent with the pure ethcathinone are obtained.
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