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p-Xylene (para-xylene) is an aromatic hydrocarbon. It is one of the three isomers of dimethylbenzene known collectively as xylenes . The p- stands for para- , indicating that the two methyl groups in p -xylene occupy the diametrically opposite substituent positions 1 and 4.
p-Xylene is the principal precursor to terephthalic acid and dimethyl terephthalate, both monomers used in the production of polyethylene terephthalate (PET) plastic bottles and polyester clothing. 98% of p-xylene production, and half of all xylenes produced is consumed in this manner. [10] [14] o-Xylene is an important precursor to phthalic ...
In the petroleum refining and petrochemical industries, the initialism BTX refers to mixtures of benzene, toluene, and the three xylene isomers, all of which are aromatic hydrocarbons. The xylene isomers are distinguished by the designations ortho – (or o –), meta – (or m –), and para – (or p –) as indicated in the adjacent diagram.
Xylene is often used in paints, glues, pesticides and cleaning agents. Xylene also is used in the plastics, chemical and synthetic fiber industries. As a vapor, xylene is heavier than air, so it ...
To maximize shelf life, keep fresh jalapeños in a plastic bag in the refrigerator. “Pop those jalapeños into a plastic bag with a zip lock and keep it slightly vented,” South Carolina-based ...
I tried six brands of store-bought tater tots from Sonic, Ore-Ida, Cascadian Farm, McCain, Signature Select, and Alexia Foods to find the best ones.
α,α'-dimethoxy-p-xylene. A similar synthesis for parylene N uses the precursor α,α'-dimethoxy-p-xylene. [28] The methoxy group H 3 CO − is the leaving group; while it condenses in the deposition chamber, it does not interfere with the deposition of the polymer. [23] This precursor is much less expensive than [2.2]para-cyclophane.
Stock Performance is the difference between a director's stock index and the S&P 500. A director's stock index is an unweighted index of company stock performances while they sat on the board. CEO pay includes salary, bonuses, stock sales, and other payments. Average CEO Pay is calculated using the last year a director sat on the board of each ...