The extracted chlorophyll is insoluble in water and soluble in organic solvents. Acetone has no special toxicity to human body, but it can cause symptoms such as headache and bronchitis after inhalation. If inhaled in large quantities, you may lose consciousness. Mainly used for degreasing, dehydration, fixation and so on in daily life. It is an important test object in blood and urine. Some cancer patients have unusually high levels of acetone in their urine. The concentration of acetone in blood and urine of people who lose weight through low-carbohydrate food therapy is also extremely high. Acetone exists in a free state in nature, mainly in the essential oils of the plant kingdom, such as tea oil, turpentine, citrus essential oil and so on. Human urine and blood, animal urine, marine animal tissues and body fluids all contain a small amount of acetone. The content of acetone in urine of diabetic patients is abnormally high. Soluble in water, ethanol, ether and other organic solvents. The mixture of steam and air can form an explosive mixture, and the explosion limit is 2.55% ~ 12.8% (by volume). The carbonyl group of acetone can react with many nucleophiles, such as catalytic hydrogenation to isopropanol and reduction to pinacol; React with ammonia derivatives, hydrocyanic acid, alkynes, organometallic compounds, etc. Acetone can also react with α-hydrogen, such as substitution reaction with halogen and aldol condensation reaction with itself or other compounds.