24dichlorophenol

2,4-Dichlorophenol, sometimes written as 24-dichlorophenol, is a chlorinated phenol in which chlorine atoms occupy the 2- and 4-positions on the aromatic ring. It is used primarily as an industrial intermediate in the manufacture of agrochemicals, dyes, and other organic compounds. In chemical catalogs it is listed under synonyms such as 2,4-dichlorophenol and 4-chloro-2-chlorophenol.

It is typically produced by chlorination of phenol under controlled conditions and can also appear as a byproduct of other chlorinated phenol production processes. Environmental releases occur from chemical plants and waste streams, and the compound has been detected in water and sediment near industrial sites.

At room temperature it appears as a colorless to pale yellow solid or oily liquid with a phenolic odor. It is moderately soluble in water and more soluble in organic solvents. It is volatile enough to require containment, as vapors can be irritating. It should be handled with appropriate personal protective equipment, contained in fume hoods, and stored in compatible, corrosion-resistant containers. Disposal follows hazardous waste regulations.

2,4-Dichlorophenol is regarded as hazardous. Exposure can irritate the skin, eyes, and respiratory tract, and ingestion or inhalation can be harmful. It is toxic to aquatic organisms and may persist in the environment; accidental releases should be contained and remediated. Regulatory controls exist in many jurisdictions, including labeling, handling, and disposal requirements.