Ключевые слова: aromatic, background, biochemistry, biology, bottle, carbon, chemical, chemistry, clear, college, component, compound, danger, dangerous, education, environmental, experiment, flammable, fluid, functional, glass, group, hydrogen, lab, label, laboratory, liquid, medical, molecule, natural, nonpolar, organic, pharmaceutical, poison, pure, reagent, research, risk, science, solution, structure, study, toluene, toxic, transparent, university,