para-xylene

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para-xylene

[¦par·ə ′zī‚lēn]
(organic chemistry)
1,4-C6H4(CH3)2 A toxic, combustible liquid; insoluble in water, soluble in alcohol and ether; boils at 139°C; used as a chemical intermediate, and to synthesize terephthalic acid, vitamins, and pharmaceuticals, and in insecticides.
References in periodicals archive ?
Blends were also prepared with p-xylene (20 vol%) and p-cymene (20 vol%) to demonstrate the impacts of increasing aromatic content without fuel oxygen.
MAt32 MAt35 Meduim 2216 LD Gram Straining + + Catalase NA NA hemolysis test [gamma] [gamma] Hydrophobi P-Xylene 60 [+ or -] 0.
For toluene and p-xylene with similar inlet concentrations, the single-pass removal efficiency of p-xylene by the synergistic effect was around twice of toluene.
Fatty acid profile: Fatty acid analysis of the mucus sample collected from the control group confirmed the presence of hexane, cyclohexane, acetic acid, heptane, toluene, ethylbenzene, carbamohydroximic acid, o- xylene, p-xylene and 8-carbon chain fatty acids (Table 1 and Figure 6.
These chemicals include dextrose and xylose, and their hydrogenated counterparts, sorbitol and xylitol, isosorbide, glucaric acid, levulinic acid, ethylene and propylene glycol, furfural, hydroxymethylfurfural, furandicarboxylic acid, p-xylene and terephthalic acid, and glycerol derivatives including acrolein, acrylic acid, and epichlorohydrin.
Adsorption of benzene, toluene, ethyl benzene and p-xylene by NaOCl-oxidized carbon nanotubes", Collo.
The process is inexpensive and currently creates the chemical p-xylene with an efficient yield of 75 per cent, using most of the biomass feedstock, Dauenhauer says.
Theoretical values of ultrasonic velocities in the mixtures: anisaldehyde + o-xylene, + m-xylene and + p-xylene at different mole fractions of anisaldehyde for different temperatures were calculated using the following theories and relations:
French IAQ European Union Canadian Observatory Index Priority NRC--IRC Hierarchical Target (b) Target Group (a) (INDEX 2005) VOC (c) (Mosqueron and (Won and Pollutant Nedellec 2002) Shaw 2004) Formaldehyde A 1 Yes Benzene A 1 Yes Acetaldehyde A 2 Yes Toluene B 2 Yes Styrene C 2 Yes m-Xylene C 2 Yes o-Xylene C 2 Yes p-Xylene C 2 Yes Health hazards--carcinogen (Scorecard 2009) Pollutant Formaldehyde Recognized Benzene Recognized Acetaldehyde Suspected Toluene Styrene Suspected m-Xylene o-Xylene p-Xylene (a) A--Very high-priority target, B--high-priority target, C--priority target, D--not a priority target.
8) as well as these for ethylene, COS, p-xylene and methane in FTIR spectra of SC and for ethylene even in FTIR spectra of B4 were presented as traces.
Assume that for this sample p-xylene is the most resistant constituent.
The thimble holder of the Soxhlet extractor was wrapped with a heating tape and heated during the extraction, to keep the p-xylene in the thimble boiling.