A sealed ampoule of pressurized supercritical liquid Ammonia.  Purity is 99.5%+.  This amazing sample will phase change when heated to 132.3°C.  Let it cool down below 132.3°C and it will condense back into the liquid phase again.  This is truly an amazing sample.  It is not recommended to heat these ampoules to the critical temp because they could burst. This fits perfectly inside the included 1 dram vial for display.

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