Xylene CAS#1330-20-7
1. Effective Solvent：
Xylene is a powerful solvent, miscible with ethanol, chloroform, and ether, commonly used in paints, resins, adhesives, and pharmaceuticals.
2. High Boiling Point & Volatility：
With a boiling point of 137-140°C, it is stable for temperature-sensitive processes while remaining volatile for applications needing fast evaporation.
3. Multiple Isomers & Versatility：
Xylene has three isomers (ortho, meta, para), each suited for different industrial uses, such as polyester production and synthetic fibers.
4. Carcinogenic & Safety Precautions;
Xylene is moderately toxic and potentially carcinogenic, requiring careful handling. Exposure limits (TWA 100 ppm) ensure safety in industrial environments.
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.
Parameters
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 |
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 |
