Paraxylene, also called pxylene, is a chemical essential to the process of manufacturing PET plastic bottles and polyester fiber Share Follow Us on Facebook Twitter YouTube RSS Print this Page Uses & Benefits Safety Information Uses & Benefits Paraxylene is widely used as a feedstock (or "building block") to manufacture otherI've been reading everywhere and I can't seem to find out how anyone would be able to distinguish m, o, and pxylene with IR spectroscopy Specifics would be very helpful, because I know the general rules like upfield/downfield shifts, etcPXylene (paraxylene) is an aromatic hydrocarbonIt is one of the three isomers of dimethylbenzene known collectively as xylenesThe pstands for para, indicating that the two methyl groups in pxylene occupy the diametrically opposite substituent positions 1 and 4It is in the positions of the two methyl groups, their arene substitution pattern, that it differs from the other isomers, o 2 P-xylene nmr spectrum