تری کلرو اتیلن
| Chemical formula | Cl2CCHCl |
| Density | 1.46 g/cm3 |
| Molar mass | 131.39 g/mol |
| CAS number | 79-01-6 |
| HS Code | 29032200 |
| EC number | 201-167-4 |
| Storage | Store at 15 to +30 °C |
| SDS | available |
| R Phrase | R 45-36/38-52/53-67 |
| S Phrase | S 53-45-61 |
| Form | liquid |
| Color | white |
| Ignition temperature | 410 °C |
| Vapor pressure | 77 hPa (20°C) |
| Melting point | – 84 °C |
| Assay | ≥ | 99.5 | % |
| Description | Conforms | ||
| Identification | Conforms | ||
| Free alkali (as NH3) | ≤ | 0.001 | % |
| Chloride | ≤ | 0.0001 | % |
| Evaporation residue | ≤ | 0.005 | % |
| Water | ≤ | 0.01 | % |
Trichloroethylene is a clear, non-flammable, volatile liquid with a slightly sweet, chloroform-like odor. It is a chlorinated hydrocarbon primarily used as an industrial solvent due to its strong degreasing ability and chemical stability.
🏭⚗️ Production
Trichloroethylene is industrially produced by the chlorination of ethylene or acetylene. In the most common method, ethylene is first converted to 1,2-dichloroethane, which is then further chlorinated and dehydrochlorinated to form trichloroethylene. The process involves several distillation steps to achieve high purity suitable for commercial use.
🔬 Properties
The chemical formula of trichloroethylene is C₂HCl₃, with a molar mass of approximately 131.39 g/mol. It is a dense, colorless liquid with a boiling point of about 87 °C and a melting point of −73 °C. It is moderately soluble in water and highly soluble in organic solvents such as alcohol, ether, and chloroform. Trichloroethylene is volatile and heavier than water, and it remains chemically stable under normal conditions but may decompose at high temperatures to produce toxic gases.
🧪 Applications
Trichloroethylene is widely used as a degreasing solvent for metal parts, especially in the automotive and aerospace industries. It is also used in the production of fluorochemicals and adhesives, as well as in cleaning agents, varnishes, and extraction processes. Historically, it was used as an anesthetic and in dry cleaning, though such uses have largely been discontinued due to health concerns.
⚠️ Safety
Trichloroethylene is classified as a hazardous chemical and a probable human carcinogen. Short-term exposure can cause dizziness, headache, nausea, and irritation of the eyes and respiratory tract. Long-term or repeated exposure may affect the liver, kidneys, and central nervous system. Proper ventilation, protective equipment, and strict adherence to handling guidelines are necessary. It should be stored in tightly sealed containers in a cool, well-ventilated area away from heat sources, open flames, and strong oxidizing agents.
