cresol


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Related to cresol: Xylenol, P-Cresol

cresol

(krē`sōl), CH3C6H4OH, any one of three aromatic alcohols present in coal tar. The three compounds are structural isomersisomer
, in chemistry, one of two or more compounds having the same molecular formula but different structures (arrangements of atoms in the molecule). Isomerism is the occurrence of such compounds. Isomerism was first recognized by J. J. Berzelius in 1827.
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; they may be thought of as hydroxy derivatives of toluenetoluene
or methylbenzene
, C7H8, colorless liquid aromatic hydrocarbon that melts at −95°C; and boils at 110.8°C;. It is insoluble in water but highly soluble in most organic solvents.
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 or as methyl derivatives of phenolphenol
, C6H5OH, a colorless, crystalline solid that melts at about 41°C;, boils at 182°C;, and is soluble in ethanol and ether and somewhat soluble in water. An aromatic alcohol, it exhibits weak acidic properties and is corrosive and poisonous.
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. The names of the three compounds indicate which of the hydrogens on the benzene ring portion of the molecule have been replaced. Two adjacent hydrogens are replaced, one with a methyl group and one with a hydroxyl group, to form ortho-cresol, also called 2-hydroxytoluene, or 2-methylphenol. When a single unreplaced hydrogen lies between the two that are replaced, the compound formed is meta-cresol, 3-hydroxytoluene, or 3-methylphenol. When the replaced hydrogens lie opposite one another on the ring, the compound formed is para-cresol, 4-hydroxytoluene, or 4-methylphenol. Because the boiling points of these three compounds are nearly the same, a separation of a mixture of the three into its pure components is impractical. The mixture of cresols obtained from coal tar is called cresylic acid. The cresols are used in the manufacture of disinfectants and synthetic resins.

cresol

[′krē‚sȯl]
(organic chemistry)
CH3C6H4OH One of three poisonous, colorless isomeric methyl phenols: o-cresol, m-cresol, p-cresol; used in the production of phenolic resins, tricresyl phosphate, disinfectants, and solvents.
References in periodicals archive ?
A dose of 180 to 250 milliliters of cresol with 5% concentration is thought to be life-threatening.
The report includes para cresol description, covers its application areas and related patterns.
1% cresol red or glass-distilled deionized water plus 0.
The study 'Meta Cresol (CAS 108-39-4) Market Research Report 2011' presents an overview of the Meta Cresol market globally and regionally.
Thus, a composition containing epoxy resins, a cresol novolac modified epoxy resin, a brominated phenol novolac resin, modified siloxanes, silica and other additives was blended, crushed into a powder, transfer injection molded and cured for eight hours at 175[degrees]C to give a product having good spiral flow and crack resistance after 500 cycles at +150[degrees]C and -196[degrees]C and also good solder resistance (failure after 72 hours in steam and the next 10 seconds in solder at 260[degrees]C).
What changes have taken place in cresol import and export in the past five years?
The obtained results showed that phenol, hydroxyphenols and cresols were degraded by activated sludge faster than dimethylphenols.
It can also identify substances such as Cresol and Benzene, exposure to which can have serious health consequences.
It can also identify chemicals such as Cresol and Benzene, exposure to which can have serious health consequences.
13]C NMR characterization of novolak resins focused on the aromatic portion of the spectrum (15), more recent work has centered on the regions between 11 - 23 ppm and 23 - 40 ppm where the cresol methyl group and the methylene linkages could be assigned to the possible isomers (16).
Tenders are invited for Procurement of ORTHO CRESOL
The novolak resin was synthesized by acid catalyzed condensation of meta- and para- cresol with formaldehyde using diglyme solvent.