xylene


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Related to xylene: O-Xylene

xylene

(zī`lēn) or

dimethylbenzene

(dī'mĕthəlbĕn`zēn), C6H4(CH3)2, colorless, oily, liquid aromatic hydrocarbonhydrocarbon
, any organic compound composed solely of the elements hydrogen and carbon. The hydrocarbons differ both in the total number of carbon and hydrogen atoms in their molecules and in the proportion of hydrogen to carbon.
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, used extensively as a solvent, obtained from coal tar, wood tar, and sometimes from petroleum. It is a mixture of three isomers that differ structurally from one another in the location of the two methyl groups that have replaced hydrogen atoms in the benzenebenzene
, colorless, flammable, toxic liquid with a pleasant aromatic odor. It boils at 80.1°C; and solidifies at 5.5°C;. Benzene is a hydrocarbon, with formula C6H6.
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 molecule. Ortho-xylene is 1,2-dimethylbenzene; it melts at −25°C; and boils at 144°C;. Meta-xylene is 1,3-dimethylbenzene; it melts at −48°C; and boils at 139°C;. Para-xylene is 1,4-dimethylbenzene; it melts at 13°C; and boils at 138°C;. The separation of these three isomers from one another by fractional distillation is difficult because their boiling points are so close together. The ortho and para isomers are converted to meta-xylene by treatment with aluminum trichloride and hydrochloric acid at about 80°C;. The xylenes are often used in the synthesis of other compounds, e.g., the xylidenes that are amino derivatives used in the synthesis of azo dyes and other compounds.

xylene

[′zī‚lēn]
(organic chemistry)
C6H4(CH3)2 Any one of the family of isomeric, colorless aromatic hydrocarbon liquids, produced by the destructive distillation of coal or by the catalytic reforming of petroleum naphthenic fractions; used for high-octane and aviation gasolines, solvents, chemical intermediates, and the manufacture of polyester resins. Also known as dimethylbenzene; xylol.

xylene

an aromatic hydrocarbon existing in three isomeric forms, all three being colourless flammable volatile liquids used as solvents and in the manufacture of synthetic resins, dyes, and insecticides; dimethylbenzene. Formula: C6H4(CH3)2
References in periodicals archive ?
In view of folklore use of Berberis lycium in inflammatory conditions such as rheumatism, its extract was evaluated for possible anti-inflammatory action against acute (carrageenan and xylene mediated) and chronic (formalin evoked) models of inflammations in mice, to rationalize aforementioned traditional use of the plant.
03: LINEARITY CURVE OF SOLVENTS (N-BUTANOL, N-PROPYL ACETATE, MIBK, TOLUENE AND XYLENE) SHOWS THE LINEARITY ABOVE 0.99 IN ALL THE CASES, CONFIRMS THE METHOD ADOPTED IS VALIDATING THE VALUE INCURRED.
The other, in 2012, aimed to identify available data on the toxicity of various chemical compounds (toluene, ethylbenzene, xylene isomers, lead, and others) and to consider their relevance in the occupational setting.
The tensile dynamic mechanical properties of the polyamide/epoxy/20% xylene sample after two days of cure at ambient temperature and humidity are shown in Figure 2.
Anti-inflammatory activity of Cucumis sativus seed in carrageenan and xylene induced edema model using albino wistar rats.
As a result of the 8-week inhalation of xylene; The lining epithelium of respiratory mucosa showed a loss of ciliated cells with metaplasia of goblet cells, hyperplasia of squamous cells and edema, inflamation in sub epithelial area.
Toluene and xylene are clear, water-insoluble aromatic hydrocarbons commonly used in industry, which are mainly produced by refining petroleum.
The emission levels of volatile organic compounds (acetone, xylene) to the atmosphere are significantly lower than those of combustion products, for example, C[O.sub.2], CO, S[O.sub.2] and N[O.sub.2].
For instance, mixed xylenes are commonly available in a 2:1:1 ratio for meta, ortho and para xylenes, but that can vary significantly depending on processing details.
In this study, the depolymerization reactions of PET realized with two different ways: aminoglycolysis of waste PET was carried out using with or without xylene. The effect of xylene and change of reactant ratios to properties of depolymerization products was investigated.
Xylene is the important organic compound which is widely used as a solvent during a variety of many industries and commercial processes, such as chemical production, printing, paint, synthetic resin, rubber, mobile emission and petroleum derivatives [2,3].
It's equally useful for ridding the air of chemicals like toluene, which is used in paints, paint thinners, and synthetic fragrances, and xylene, a chemical found in glues and paints.