Product Description of Xylene CAS#1330-20-7
Xylene (dimethylbenzene) is a colorless, clear aromatic liquid formed when two hydrogen atoms on a benzene ring are substituted with methyl groups. It has a boiling point range of 137-140°C. Based on the relative positions of the two methyl groups, xylene exists in three isomeric forms: ortho-xylene, meta-xylene, and para-xylene. Industrially, xylene typically denotes a mixture of these three isomers along with ethylbenzene. The commercial grades are generally classified as premium or first grade, with purified water distillation ranges of either 3°C or 5°C according to Chemicalbook standards.
This compound is completely miscible with ethanol, chloroform, or ether but does not dissolve in water. It finds extensive application as an organic solvent and in the production of pharmaceuticals, paints, resins, dyes, explosives, and pesticides. Xylene exhibits moderate toxicity and possesses some carcinogenic potential. Environmental contamination by xylene primarily originates from synthetic fibers, plastics, fuels, rubber products, various paint additives, adhesives, waterproofing materials, as well as from fuel combustion emissions and tobacco smoke.
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Chemical Properties of Xylene CAS#1330-20-7
| 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 | n |
| Fp | 77 °F(lit.) |
| storage temp. | Flammables area |
| solubility | Chloroform (Soluble), Methanol (Slightly) |
| form | Liquid |
| color | APHA: ≤10 |
| Odor | char. sweet odor |
| explosive limit | 7% |
| Water Solubility | <0.1 g/L (20 ºC) |
| Merck | 14,10081 |
| BRN | 1901563 |
| Exposure limits | ACGIH: TWA 100 ppm; STEL 150 ppm OSHA: TWA 100 ppm(435 mg/m3) |
| Dielectric constant | 10.0（Ambient） |
| Stability: | Volatile, flammable and its vapors form explosive mixtures with air at room temperature. |
| 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) |
Safety Information
| Hazard Codes | Xn,F |
| Risk Statements | 10-20/21-38-36/38-65-48/20 |
| Safety Statements | 25-36/37-62 |
| RIDADR | UN 1307 3/PG 3 |
| OEB | A |
| OEL | TWA: 100.0 ppm; 435.0 mg/m3, STEL: 150.0 ppm; 655.0 mg/m3 |
| WGK Germany | 2 |
| RTECS | ZE2100000 |
| Autoignition Temperature | 867 °F |
| TSCA | Yes |
| HazardClass | 3 |
| PackingGroup | II |
| HS Code | 29024400 |
| Hazardous Substances Data | 1330-20-7(Hazardous Substances Data) |
| Toxicity | LD50 oral in rat: 4300mg/kg |
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Product Application of Xylene CAS#1330-20-7
Xylene is a versatile aromatic solvent widely used in paints, coatings, adhesives, inks, and rubber processing. It also serves as a key chemical intermediate: para-xylene produces terephthalic acid for PET plastics and fibers, while meta-xylene yields is ophthalic acid for specialty polymers. In laboratories, it acts as a clearing agent in histology and a solvent for microscope immersion oil. Additional uses include pesticides, dyes, leather processing, and as a cleaning agent for electronics and steel components.
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