| Identification | English name | Xylene | Molecular formula；C8H10 | Molecular weight：106.17 | ||||||||||
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Dangerous goods number |
33535 | UN number | 1307 | ||||||||||
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IMDG rule page number |
3292 | CAS number | 95-47-6 | ||||||||||
| Physical and chemical properties |
Appearance and traits |
A colorless, transparent liquid with a toluene-like odor. | ||||||||||||
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Melting point °C |
-25.5 |
Relative density (air = 1) |
3.66 | ||||||||||
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Boiling point °C |
144.4 |
Critical temperature °C |
357.2 | ||||||||||
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Relative density (water = 1) |
0.88 |
Critical pressure MPa |
3.70 | ||||||||||
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Saturated vapor pressure KPa |
1.33(32℃) |
Combustion heat Kj/mol |
4563.3 | ||||||||||
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Minimum ignition energy mJ |
—— | ||||||||||||
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Solubility |
It is insoluble in water and can be miscible in most organic solvents such as ethanol, ether and chloroform. |
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| Toxicity and hazards |
Exposure limit |
China MAC: 100mg/m3 |
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Route of invasion |
Soviet MAC: 50mg/m3 |
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Health hazard |
US TWA: OSHA 100ppm, 434mg/m3; ACGIH 100ppm, 434mg/m3 |
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Burning explosion hazard |
Burning explosion hazard |
Flammable | flash point °C | 25 | ||||||||||
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Auto-ignition temperature °C |
463 | Explosion limit % | Lower limit 1.0, upper limit 7.0 | ||||||||||
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Dangerous characteristics |
Its steam forms an explosive mixture with air, causing a fire and explosion in case of open fire and high heat. It can react with oxidants. Its steam is heavier than air, can spread to a relatively distant place at a lower place, and ignites in case of fire. In case of high heat, the internal pressure of the container increases, posing a risk of cracking and explosion. The flow rate is too fast, and it is easy to generate and accumulate static electricity. | ||||||||||||
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Combustion decomposition product |
Carbon monoxide, carbon dioxide. |
Polymerization hazard |
Can’t appear |
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Stability |
stable |
Incompatibility |
Strong oxidants |
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Fire fighting methods |
Foam, carbon dioxide, dry powder, sand, fire extinguishing is not effective. | ||||||||||||
| Storage and transportation considerations | Store in a low-temperature ventilated place, away from fire and heat. Avoid co-preservation and transportation with oxidants. It is forbidden to use tools that are prone to sparks. | |||||||||||||
| package | Packaging classification | II | Packaging mark | 7 | ||||||||||
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Carbon monoxide, carbon dioxide. |
Carbon monoxide, carbon dioxide. |
Carbon monoxide, carbon dioxide. |
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first-aid |
Skin contact: Remove contaminated clothing and wash skin thoroughly with soap and water. |
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Leakage emergency treatment |
Eye contact: Lift eyelids and rinse with running water. Seek medical attention. |
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