p-Xylene

p-Xylene
Other names p-Xylol 1,4-Dimethylbenzene
Identifiers
CAS number	106-42-3 Y
UNII	6WAC1O477V N
KEGG	C06756 Y
ChEMBL	CHEMBL31561 N
RTECS number	ZE2625000
Jmol-3D images	Image 1
SMILES CC1=CC=C(C)C=C1
Properties
Molecular formula	C8H10
Molar mass	106.16 g/mol
Appearance	Colorless liquid colorless crystalline solid
Density	0.861 g/mL
Melting point	13.2 °C, 286 K, 56 °F
Boiling point	138.35 °C, 412 K, 281 °F
Solubility in water	insoluble
Solubility in ethanol	very soluble
Solubility in diethyl ether	very soluble
Refractive index (nD)	1.49582
Viscosity	0.7385 cP at 0 °C 0.6475 cP at 20 °C
Dipole moment	0.07 D
Hazards
MSDS	External MSDS
R-phrases	R10 R20 R21 R36 R38
S-phrases	S25
Main hazards	Harmful or fatal if swallowed. Vapor harmful. Flammable liquid and vapor.
NFPA 704	3 2 0
Flash point	25 °C
Related compounds
Related aromatic hydrocarbons	benzene toluene o-xylene m-xylene
Supplementary data page
Structure and properties	n, εr, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
N (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

p-Xylene is an aromatic hydrocarbon, based on benzene with two methyl substituents. 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 and m-xylene. p-Xylene is used on a large scale for the manufacture of terephthalic acid for polyester. Its polymer is known as Parylene. p-Xylene is produced by catalytic reforming of naphtha (a petroleum derivative) and separated in a series of distillation, adsorption or crystallization and reaction processes from m-xylene, o-xylene and ethylbenzene. Its melting point is the highest among this series of isomers, but simple crystallization does not allow easy purification due to the formation of eutectic mixtures.

References

External links

• MSDS

This article about an aromatic compound is a stub. You can help Wikipedia by expanding it.v · Categories: Alkylbenzenes Aromatic compound stubs Wikimedia Foundation. 2010. Игры ⚽ Нужна курсовая? Auto Union racing car p-Xylene (data page) Look at other dictionaries: Xylene — Xylène ortho xylène C6H4(CH3)2 …   Wikipédia en Français xylène — [ gzilɛn; ksilɛn ] n. m. • 1872; de xyl(o) et ène ♦ Chim. Hydrocarbure liquide benzénique, de formule C6H4 (CH3)2, extrait du benzol ou de certaines fractions de pétrole, utilisé comme solvant et comme matière première pour des synthèses… …   Encyclopédie Universelle Xylene — Xy lene, n. [Gr. xy lon wood.] (Chem.) Any of a group of three metameric hydrocarbons of the aromatic series, found in coal and wood tar, and so named because found in crude wood spirit. They are colorless, oily, inflammable liquids,… …   The Collaborative International Dictionary of English xylene — 1851, from Gk. xylon wood, which is of unknown origin, + ENE (Cf. ene) …   Etymology dictionary xylene — [zī′lēn΄] n. [ XYL(O) + ENE] any of three isomeric, colorless hydrocarbons, C8H10, having the characteristics of benzene and derived from coal tar, wood tar, and petroleum: used as solvents, antiseptics, etc …   English World dictionary Xylène — Le xylène ou diméthylbenzène est un groupe d hydrocarbures aromatiques dérivés méthylés du benzène. Il est représenté par trois isomères structuraux : 1,2 diméthylbenzène, 1,3 diméthylbenzène et 1,4 diméthylbenzène (appelés respectivement… …   Wikipédia en Français Xylene — The xylene isomers Xylene encompasses three isomers of dimethylbenzene. The isomers are distinguished by the designations ortho (o ), meta (m ), and para (p ), which specify to which carbon atoms (of the benzene ring) the two methyl groups are… …   Wikipedia Xylene cyanol — Chembox new Name = Xylene cyanol ImageFile = Xylene cyanol.png ImageName = IUPACName = Section1 = Chembox Identifiers CASNo = 2650 17 1 SMILES = [Na+] .CCNc1ccc(cc1C)/C(=C2/C=CC(= [NH+] CC) C(=C2)C)c3ccc(OS( [O ] )=O)cc3OS( [O ] )=O Section2 =… …   Wikipedia xylene — /zuy leen/, n. Chem. any of three oily, colorless, water insoluble, flammable, toxic, isomeric liquids, C8H10, of the benzene series, obtained mostly from coal tar: used chiefly in the manufacture of dyes. Also, xylol /zuy lawl, lol/. Also called …   Universalium xylene dimethylbenzene —    A commercial mixture of the three isomers, ortho , meta , and para xylene. The last two predominate. Used as protective coatings; solvent for alkyd resins, lacquers, rubber cements; synthesis of organic chemicals. An aromatic compound having… …   Forensic science glossary xylene — noun /ˈzaɪliːn/ Any of a group of three isomeric aromatic hydrocarbons, di methyl benzene, found in coal and wood tar. [...] proceeding, desperately, from such opiated catarrh preparations as Collis Browns Mixture on to cocainized brain tonics,… …   Wiktionary 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”