HPLC Separation of Haloaromatics and Quinones on Newcrom B Column

High Performance Liquid Chromatography (HPLC) Method for Analysis of Benzoquinone , Hydroquinone , Chlorothalonil , Chloranil , Pentachlorophenol , Tetrachlorohydroquinone .

1,4-benzoquinone , also known as para -quinone, is a compound with the formula C6H4O2 . It is typically used as a precursor to hydroquinone, which is a reducing agent and antioxidant. It also serves as a dehydrogenation reagent and dienophile in Diels-Alder reactions.

1,4-hydroquinone is an aromatic derivative of benzene with the chemical formula C6H6O2 . It is often used in skin whitening, although it has been banned by the United States Food and Drug Administration for over-the-counter use due to being a potential carcinogen. It can cause a variety of disease including but not limited to ochronosis. thyroid follicular cell hyperplasias, mononuclear cell leukemia, and adenomas. Agencies across the world encourage research into other agents to treat hyperpigmentation. You can find detailed UV spectra of hydroquinone and information about its various lambda maxima by visiting the following link.

Chloranil , also known as tetrachloro-1,4-benzoquinone, is a quinone with the chemical formula C6Cl4O2 . It is a planar molecule that functions as an oxidant. It serves as a hydrogen acceptor and is more electrophilic than quinone. Chloranil is used to test for free secondary amines, which is useful to check for the presence of proline derivatives. Commercially, it is a precursor to dyes.

Chlorothalonil is a compound with a variety of uses as a fungicide, wood protectant, pesticide, and acaricide. It is used predominantly on peanuts, potatoes, and tomatoes. Outside of agriculture, it is also used in paints, resins, emulsions, and coatings. It’s chemical formula is C8Cl4N2 .

Tetrachlorohydroquinone , also known as TCHQ , is a chlorinated organic compound with the chemical formula C6H2Cl4O2 . It is a metabolote of the biocide pentachlorophenol. It causes damage to cells by increasing reactive oxygen species (ROS). It is harmful if swallowed and can cause serious eye damage.