1. Meaning of xylene:
Xylene, chemical formula C8H10, xylene or xylene aromatic hydrocarbon mixture, composed of two methyl groups at different positions of the benzene ring. There are three isomers, namely o-xylene (CAS number 95-47-6), m-xylene (CAS number 108-38-3), and p-xylene (CAS number 106-42-3). The molecular formula of the three isomers of xylene is C8H10, or it can be expressed by the semi-structural formula C6H4(CH3)2. In industry, xylene refers to a mixture of the above isomers.

2. Indicators:
1. Molar refractive index: 35.9
2. Molar volume (cm3/mol): 121.9
3. Isotonic specific volume (90.2 K): 282.5
4. Surface tension (dyne/cm): 28.7
5. Dielectric constant: 2.39
6. Polarizability (10-24 cm3): 14.23
7. Monoisotopic mass: 106.07825 Da
8. Nominal mass: 106 Da
9. Average mass: 106.165 Da

3. Application of xylene:
1. Used as solvent for nitro spray paint, coating, adhesive and varnish, and used to make raw materials and rubber additives for aniline, phenol, picric acid, dyes, artificial musk, synthetic fibers, medicines, spices, pesticides, etc.
2. Used to determine the water content in compounds. Solvents and cleaning agents for precision optical instruments and electronics industry.
3. Used as solvent, cleaning agent for precision optical instruments and electronic industry.
4. Used in the electronic industry, often used as cleaning degreasing agent and some photoresist solvents.

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