Ключевые слова: analysis, blue, bottle, chemical, chemicals, chemistry, compound, container, dangerous, discovery, equipment, experiment, factory, glass, hazard, hazardous, industrial, industry, lab, label, laboratory, liquid, manufacturing, material, methylene, methylene blue, object, product, raw, reaction, research, risk, scale, science, scientific, scientist, solution, study, substance, symbol, tag, test, warning,