Scientist dropping the reagent into test tube for reaction testing in chemical laboratory
Mixing of alkali and phenolphthalein solution, chemical reaction. The test tube is close-up
Woman observing chemical reaction with test tube
Scientists discuss results of reaction of chemical liquids in test tubes
Chemical reaction on a black background between ammonia and hydrogen chloride. Smoke without fire. The test tube is close-up
Man in medical gown and glasses watching chemical reaction in test tube
Chemical reaction. Stock footage. Small test tubes are tested with special solutions that boil.
Scientist pours chemicals from a test tube into a flask, triggering an intense chemical reaction
Researcher pours chemicals from a test tube into a flask, triggering an intense chemical reaction
Chemical process. Action. Chemical reaction with blue bubbling water in a special test tube.
Chemical reaction. Stock footage. Small test tubes are tested with special solutions that boil.
Laboratory equipment. Laboratory research. Chemical reaction. Chemistry experiment. Medical analysis. Test tube. Blue liquid swirling in laboratory flask. Medical experiment