Physical and chemical properties of xylene

1. Keep the storage container sealed and store it in a cool, dry place, ensuring good ventilation or exhaust in the workspace.

2. For the packaging and storage of this product, please refer to benzene. Packaging, labeling, storage, transportation, and delivery acceptance shall be carried out in accordance with ZBE300005.

If used and stored according to specifications, it will not decompose, there are no known hazardous reactions, and oxidation should be avoided.

2. Colorless and transparent liquid with moderate toxicity, operators should wear protective equipment.

3. This product has moderate toxicity. After being absorbed through the skin, its impact on health is much smaller than that of benzene. When the content of xylene in the air reaches 0.71 × 10-6, a foul odor can be felt, with toluene at 0.48 × 10-6 and benzene at 1.5 × 10-6. At such concentrations, benzene poses a risk of chronic poisoning, while xylene is hardly a concern. High concentration xylene vapor, such as 1000 × 10-6 or more, not only damages the mucosa and stimulates the respiratory tract, but also exhibits excitatory and anesthetic effects, and even causes hemorrhagic emphysema and death. The incidence of poisoning caused by oral ingestion of xylene is extremely rare. If xylene or solvents containing xylene are accidentally taken orally, it can strongly irritate the esophagus and stomach, cause vomiting, and may also lead to hemorrhagic pneumonia. Liquid paraffin should be immediately consumed and medical treatment should be sought. The LC of xylene vapor on mice is 6000 × 10-6, and the lowest oral lethal dose for rats is 4000mg/kg.

4. It is a mixture of ortho xylene, meta xylene, and para xylene, called mixed xylene, with meta xylene having a higher content.

1. Molar refractive index: 35.9

2. Molar volume (cm3/mol): 121.9

3. Waiting for Zhang Biarong (90.2K): 282.5

4. Surface tension (dyne/cm): 28.7

5. Dielectric constant: 2.39

6. Polarization rate (10-24cm3): 14.23

7. Single isotope mass: 106.07825 Da

8. Nominal mass: 106 Da

9. Average quality: 106.165 Da

1. Reference value for hydrophobic parameter calculation (XlogP): 3.2

2. Number of hydrogen bond donors: 0

3. Number of hydrogen bond acceptors: 0

4. Number of rotatable chemical bonds: 0

5. Topological Molecular Polarity Surface Area (TPSA): 0

6. Number of heavy atoms: 8

7. Surface charge: 0

8. Complexity: 58.4

9. Number of isotopic atoms: 0

10. Determine the number of atomic stereocenters: 0

11. Uncertain number of atomic stereocenters: 0

12. Determine the number of chemical bond stereocenters: 0

13. Uncertain number of chemical bond stereocenters: 0

14. Number of covalent bond units: 1

1. Appearance: Colorless, transparent, flammable, and volatile liquid with aromatic odor, toxic.

2. Density (g/mL, 25/4 ℃): 0.86

3. Relative vapor density (g/mL, air=1): 3.7

4. Melting point (º C): -34

5. Boiling point (º C, atmospheric pressure): 137-140

6. Boiling point (º C, 5.2kPa): undetermined

7. Refractive index: 1.497

8. Flash point (º C): 25

9. Specific rotation (º): not determined

10. Spontaneous combustion point or ignition temperature (º C): 463.8

11. Vapor pressure (kPa, 25 º C): not determined

12. Saturated vapor pressure (kPa, 60 º C): not determined

13. Combustion heat (KJ/mol): undetermined

14. Critical temperature (º C): not determined

15. Critical pressure (KPa): undetermined

16. Logarithmic value of oil-water (octanol/water) partition coefficient: undetermined

17. Explosion upper limit (%, V/V): 7

18. Lower explosive limit (%, V/V): 1.1

19. Solubility: It can be mixed with various organic solvents such as ethanol, ether, chloroform, etc., and is insoluble in water.