Product Description of Xylene CAS#1330-20-7
Xylene (dimethylbenzene) is a clear, colorless aromatic liquid. Its molecular structure is formed when two hydrogen atoms on the benzene ring are substituted by methyl groups, and its boiling point ranges from 137 to 140°C.
Three isomers of xylene exist: o-xylene, m-xylene and p-xylene, distinguished by the positional arrangement of methyl substituents. In industrial scenarios, the term “xylene” usually denotes a blend of these three isomers together with ethylbenzene. Commercial grades are commonly categorized as premium grade and first-grade, classified according to distillation ranges of 3°C and 5°C respectively.
This solvent is fully miscible with ethanol, chloroform and diethyl ether, yet immiscible with water. It is extensively utilised as an organic solvent across pharmaceutical, coating, resin, dyestuff, explosive and pesticide industries.
Xylene carries moderate toxicity and poses potential carcinogenic hazards. Environmental contamination can originate from synthetic fibers, plastics, fuels, rubber, coating additives, adhesives, waterproof materials, as well as exhaust released during fuel combustion and tobacco burning.
Xylene Chemical Properties
| Melting point | -34 °C |
| Boiling point | 137-140 °C (lit.) |
| density | 0.86 g/mL at 25 °C (lit.) |
| vapor density | 3.7 (vs air) |
| vapor pressure | 18 mm Hg ( 37.7 °C) |
| refractive index | n20/D 1.497(lit.) |
| Fp | 77 °F(lit.) |
| storage temp. | Flammables area |
| solubility | Chloroform (Soluble), Methanol (Slightly) |
| form | Liquid |
| color | APHA: ≤10 |
| Odor | char. sweet odor |
| explosive limit | 0.07 |
| Water Solubility | <0.1 g/L (20 ºC) |
| Merck | 1410081 |
| Dielectric constant | 10.0（Ambient） |
| BRN | 1901563 |
| Exposure limits | ACGIH: TWA 100 ppm; STEL 150 ppm |
| OSHA: TWA 100 ppm(435 mg/m3) | |
| Stability: | Volatile |
| InChIKey | KAKOUNRRKSHVJO-UHFFFAOYSA-N |
| LogP | 3.16 at 20℃ |
| CAS DataBase Reference | 1330-20-7(CAS DataBase Reference) |
| IARC | 3 (Vol. 47, 71) 1999 |
| EPA Substance Registry System | Xylene (1330-20-7) |
Product Application of Xylene CAS#1330-20-7
Xylene serves broadly as an industrial solvent. It can be utilised to test the water content of diverse organic compounds and act as a cleaning medium for microscope equipment.
Additionally, it functions as a cleaner for silicon components and thermistors, efficiently eliminating impurities for electronics and precision manufacturing applications.
Xylene comprises o-xylene, m-xylene, p-xylene and ethylbenzene. If deployed as a chemical feedstock, the respective isomers can be separated before subsequent processing steps.
This material is mainly adopted as a solvent for paints and coatings. It can also be incorporated as an additive in aviation gasoline to enhance the performance of fuel formulations.
