orange poweder ammonium dichromate in a glass bottle

acid acidic agent ammonium bichromate carcinogen carcinogenic catalyst chemical chemistry chromates chromic chromium closeup compound container conversion crystallisation crystals danger decomposition demonstration dichromate dichromates dyeing exothermic experiment fire hexavalent highly inorganic ions irritant laboratory leather lithography macro manufacturing mordant nature nitrogen oil orange oxidation oxidising photoactive photography pigments purification pyrochromate pyrotechnics research science scientific sealed site state tabletop tanning thermal thermodynamically toxic unstable vesuvian volcano volcanoes