A sealed ampoule of pressurized supercritical Xenon gas. Purity is 99%+. This amazing sample will phase change before your eyes when cooled below 16°C. Let it warm up above 16°C and watch it boil away into the gas phase again. The first picture shows a cooled ampoule on the left in liquid phase and a room temp ampoule in gas phase on the right for comparison. This is truly an amazing sample and fun to watch! This fits perfectly inside the included 1 dram vial for display.