what is cresol used for

a phenol from coal or wood tar; a mixture of isomeric cresol from coal tar or petroleum is used as a disinfectant and in making synthetic resins. The name cresol reflects their structure, being phenols, and their traditional source, creosote. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. meta-Cresol, also 3-methylphenol, is an organic compound with the formula CH3C6H4(OH). [citation needed] About half of the world's supply of cresols are extracted from coal tar. They are also used in low concentrations in sheep-dips (disinfectants often containing insecticides and pesticides). A mixture of the three isomeric methyl phenols, Thus, a composition containing epoxy resins, a. It is not known what the effects are from long-term ingestion or skin contact with low levels of cresols. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Skin contact with high levels of cresols can burn the skin and damage the kidneys, liver, blood, brain, and lungs. Breathing high levels of cresols for a short time results in irritation of the nose and throat. Acute poisoning may result in rapid circulatory collapse; chronic poisoning may produce gastrointestinal symptoms, vertigo, skin rashes, jaundice, and uremia. Buckley's Formocresol: 19% formaldehyde, 35% cresol, 17.5% gylcerine. As phenol derivatives, cresols can be used in phenol-formaldehyde resins. Cresols (also hydroxytoluene) are organic compounds which are methylphenols. p-Cresol can be converted to butylated hydroxytoluene (BHT), an important antioxidant in foods. It is a derivative of phenol and is an isomer of p-cresol and o-cresol. Professor of Chemistry, Whitman College, Walla Walla, Washington. All three isomers are very toxic, and in high concentrations they can be absorbed in fatal amounts through the skin. The cresols are strong germicides, and in low concentrations they are effective disinfectants and antiseptics. m-Cresol is also used in making photographic developer and explosives. Helmut Fiegein "Cresols and Xylenols" in Ullmann's Encyclopedia of Industrial Chemistry" 2007; Wiley-VCH, Weinheim. This mixture is also called tricresol, or cresylic acid. Our editors will review what you’ve submitted and determine whether to revise the article. No human or animal studies have shown harmful effects from cresols on reproduction. Author of. Get exclusive access to content from our 1768 First Edition with your subscription. The cresols are obtained from coal tar or petroleum, usually as a mixture of the three stereoisomers (molecules with the same number and type of atoms but with unique atom arrangements). Anisole converts to cresols under these conditions. They are a widely occurring natural and manufactured group of aromatic organic compounds, which are categorized as phenols (sometimes called phenolics). The rest is produced by hydrolysis of chlorotoluenes or the related sulfonates. Depending on the temperature, cresols can be solid or liquid because they have melting points not far from room temperature. The Occupational Safety and Health Administration has set a permissible exposure limit at 5 ppm (22 mg/m3) over an eight-hour time-weighted average, while the National Institute for Occupational Safety and Health recommends a limit of 2.3 ppm (10 mg/m3). Temperatures above 300 °C are typical.

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