Xylene is an organic compound. It is one of the three isomers of dimethylbenzene. It contains two methyl groups attached to a benzene ring at different positions. The chemical formula of xylene is (CH3)2C6H4. The three isomers of dimethylbenzene are ortho-xylene, para-xylene (CAS 106-42-3) and meta-xylene.
What is the difference between xylene and p-Xylene?
Xylene is a mixture of three structural isomers.
- p-Xylene (para-xylene, CAS 106-42-3): Two methyl groups are located at the 1,4-position (opposite each other on the benzene ring).
- o-Xylene (ortho-xylene, CAS 95-47-6): Two methyl groups are at the 1,2-position (adjacent to each other).
- m-Xylene (meta-xylene, CAS 108-38-3): Two methyl groups are at the 1,3-position (separated by one carbon atom).
Applications
Xylene (mixed isomers):
Primarily used as a general-purpose organic solvent in industries like coatings, printing, rubber, and metal cleaning. It is also a common reagent in laboratory sample preparation.
p-Xylene:
The most valuable isomer in the xylene family, specialized for the production of polyester materials. Para Xylene P-Xylene is oxidized to terephthalic acid (TPA), which is the core raw material for polyethylene terephthalate (PET) - the material used for plastic bottles, polyester fibers, and food packaging films.
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