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|Section2= |Section7= |Section8= }} ''m''-Xylene (or ''meta''-xylene) is an aromatic hydrocarbon, based on benzene with two methyl substituents. It is an isomer of ''o''-xylene and ''p''-xylene. The ''m'' stands for ''meta'', meaning the two methyl substituents are at locants 1 and 3 on the aromatic ring. ''m''-Xylene is commonly produced in BTX processes, and separated as needed from the other aromatic hydrocarbons. The major chemical use of ''meta''-xylene is in the manufacture of isophthalic acid, which is used as a copolymerizing monomer to alter the properties of polyethylene terephthalate (PET), making PET more suitable for the manufacture of soft drinks bottles. To convert m-xylene on an industrial scale to isophthalic acid, the two methyl groups are both catalytically oxidized to carboxyl groups. It is also used as a raw material in the manufacture of 2,4- and 2,6-xylidine as well as a range of smaller-volume chemicals.〔Ashford's Dictionary of Industrial Chemicals, third edition, page 9692.〕 ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「M-Xylene」の詳細全文を読む スポンサード リンク
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