inorganic chemistry. structure of colored inorganic salts in test tubes with chemical formulas.

analytical background black blue chemical chemistry chloride chrome chromium closeup cobalt color colored colorful copper crystal crystalline design different equipment experiment explore formula formulas glass green industry inorganic isolated label laboratory nickel orange oxidation permanganate poisonous potassium powder reagent red research salt salts sample science scientific set sodium structure sulfate technology test toxic transparent tubes white work