Ключевые слова: alum, analysis, bottle, chemical, chemicals, chemistry, compound, container, danger, dangerous, discovery, equipment, experiment, factory, flake, glass, hazard, hazardous, industrial, industry, lab, laboratory, manufacturing, material, object, potassium, potassium alum, powder, product, raw, reaction, research, risk, sample, science, scientific, scientist, substance, test, warning, white,