Lexikon

chlorophenols are derivatives of phenols that contain one or morecovalenly bonded chlorine atoms. Most chlorophenols have a number of different isomer. Monochlorophenols have three isomers because there is only chlorine atom which can occupy one of three ring positions on the phenol molecule; dichlorophenols have 4, trichlorophenols: 6, tetrachlorophenols: 3, and pentachlorophenols only one.
In the past, it has been used as a herbicide, insecticide, fungicide, algaecide, disinfectant and as an ingredient in antifouling paint. Some applications were in agricultural seeds (for nonfood uses), leather, masonry, wood preservation, cooling tower water, rope and paper mill system.
Since the early 1980s, the purchase and use of PCP in the U.S has not been available to the general public. Nowadays most of the PCP is restricted to the treatment of utility poles and railroad ties.

phenols, sometimes called phenolics, are a class of chemical compounds consisting of an -OH group attached to anaromatic benzene ring. The simplest of the class is phenol (C₆H₅OH).

phenols have unique properties and are not classified as alcohols (since the hydroxyl group is not bonded to a saturated carbon atom). They have relatively high acidity.
Some phenols are germicidal and are used in formulating disinfectants. Others possess endocrine disrupting activity.
Some others are biological active molecules with positive health effects, such as flavonoids and tannins, capsaicine or salicilic acid.