CAS 95-47-6 o-Xylene (ortho-xylene) is an aromatic hydrocarbon with the formula C6H4(CH3)2, with two methyl substituents bonded to adjacent carbon atoms of a benzene ring (the ortho configuration). It is a constitutional isomer of m-xylene and p-xylene, the mixture being called xylene or xylenes. o-Xylene is a colourless slightly oily flammable liquid.
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o-Xylene Specification |
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Assay Item |
Standard |
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Form |
Liquid |
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Color |
Yellow to beige |
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Density |
0.879 g/mL at 20 °C (lit.) |
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M elting P oint |
-26--23 °C (lit.) |
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Refractive I ndex |
n20/D 1.505(lit.) |


ortho-xylene uses
- Phthalic Anhydride Production: The primary use of o-Xylene is as a feedstock for the production of phthalic anhydride, which is then used to make plasticizers (for PVC), polyester resins, and alkyd resins.
- Solvent: Serves as an excellent solvent for paints, coatings, lacquers, inks, and pesticides due to its strong solvency power and controlled evaporation rate.
- Pesticide and Dye Production: Used as an intermediate in the synthesis of various agricultural chemicals (e.g., pesticides) and dyestuffs.
- Chemical Intermediate: An important building block in the synthesis of other organic chemicals, contributing to a wide range of industrial products.
- Specialty Polymers: Utilized in the production of certain specialized polymers and resins.
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