clear liquid methylene chloride is a widely used organic solvent, slightly soluble in water, easily soluble in ether and ethanol, volatile at room temperature, and poisoning can occur if used carelessly. Dichloromethane is found in many commonly used reagents, such as various paints, coatings, furniture polishes and cleaners, hair styling agents, household air cleaners, deodorants, leather shoe polishes and cleaners, etc.

Its folding, migration and diffusion in the environment, clear liquid methylene chloride is a chemical that is fabricated and discharged by the metal products industry. once it leaks to the ground, it quickly disappears from the soil surface through evaporation, and the remaining part infiltrates into the groundwater through the soil. Biodegradation in aqueous systems is possible, but much slower than evaporation, and hydrolysis is not a significant pathway under normal environmental conditions. The dichloromethane discharged into the atmosphere is degraded by contact with other gases, and a small part diffuses into the stratosphere, and is rapidly degraded by ultraviolet irradiation and contact with chloride ions. It is estimated that a small part will return to the earth with rainwater.

Its folding and transformation, the clear liquid methylene chloride released into the atmosphere, has a fast photolysis rate and rarely accumulates in the atmosphere. Its initial degradation products are phosgene and carbon monoxide, which are then converted into carbon dioxide and hydrochloric acid. The combustion (decomposition) products of methylene chloride are carbon monoxide, carbon dioxide, hydrogen chloride, and phosgene.