P-Xylene 1999126 216838728 2008-06-03T13:25:05Z Rifleman 82 1255637 Reverted edits by [[Special:Contributions/Wkltan|Wkltan]] ([[User talk:Wkltan|talk]]) to last version by 123.195.207.78 {{lowercase|p-Xylene}} {{Chembox new | Name = ''p''-Xylene | ImageFile = p-Xylene.png | ImageName = p-Xylene | ImageSize = 200px | ImageFile1 = p-xylene-spaceFilling.png | ImageSize1 = 150px | ImageName1 = p-xylene 3D diagram | OtherNames = ''p''-Xylol<br />1,4-Dimethylbenzene | Section1 = {{Chembox Identifiers | CASNo = 106-42-3 | RTECS = ZE2625000 | SMILES = CC1=CC=C(C)C=C1 }} | Section2 = {{Chembox Properties | Appearance = Colorless liquid<br>colorless crystalline solid | Formula = C<sub>8</sub>H<sub>10</sub> | MolarMass = 106.16 g/mol | BoilingPtC = 138.35 | MeltingPtC = 13.2 | Density = 0.861 g/mL | RefractIndex = 1.49582 | Solubility = insoluble | Solubility1 = very soluble | Solvent1 = ethanol | Solubility2 = very soluble | Solvent2 = diethyl ether | Viscosity = 0.7385 c[[Poise|P]] at 0 °C<br>0.6475 c[[Poise|P]] at 20 °C | Dipole = 0.07 [[Debye|D]] }} | Section7 = {{Chembox Hazards | ExternalMSDS = [http://www.jtbaker.com/msds/englishhtml/x2600.htm External MSDS] | FlashPt = 25 °C | MainHazards = Harmful or fatal if swallowed. Vapor harmful. Flammable liquid and vapor. | NFPA-H = 1 | NFPA-F = 3 | NFPA-R = 0 | NFPA-O | RPhrases = {{R10}} {{R20}} {{R21}} {{R36}} {{R38}} | SPhrases = {{S25}} }} | Section8 = {{Chembox Related | Function = [[aromatic hydrocarbon|aromatic<br />hydrocarbons]] | OtherFunctn = [[benzene]]<br />[[toluene]]<br />[[o-xylene]]<br />[[m-xylene]] }} }} '''''p''-Xylene''' is an [[aromatic hydrocarbon]], based on [[benzene]] with two [[methyl]] [[substituent]]s. The “p” stands for ''para'', identifying the location of the methyl groups as across from one another. It is an isomer of [[xylene]]. Other isomers include [[O-Xylene|''o''-xylene]] and [[M-Xylene|''m''-xylene]]. ''p''-Xylene is used on a large scale for the manufacture of [[terephthalic acid]] for [[polyester]]. Its [[polymer]] is known as [[parylene]]. ==References== {{Unreferenced|date =September 2007}} <references/> [[Category:Aromatic hydrocarbons|Xylene, m-]] {{hydrocarbon-stub}} [[pt:P-xileno]] [[vi:M-Xylen]] [[zh:间二甲苯]]