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Trichloroethylene    
CAS NO.:79-01-6

1.Molecular formula:
C2HCl3  
Molecular weight131.39
2.Rational formula:
CHCl=CCl2
3.Appearance:
colorless transparent flow liquid, with chloroform-like odor.
4. Physical property:
¢Ù Boiling point87.19¡æ  ¢Ú Relative density 1.4649¡¡
¢ÛFlash point: No            ¢Ü Ignition point 425¡æ
5.Chemical property:
Trichloroethylene without stabilizer can be oxidized in the air. Trichloroethylene with stabilizer is table matter, it doesn't react with metal even it is heated to 130¡æ.
6. Uses:
It is a good solvent, or used as substitute of benzene and gasoline. It can be used in the degrease, deoil, dewax and paint removing of metal. It also can be used as the material of Tetrachloroethylene, chloroacetic acid, dichloroacetyl chloride, 2,3,3,3;2',3',4',4'-octachlor odipropyl ether, HCFC----123, HCFC---124, HFC---125, HFC---134a, and so on.
7.Cautions:
It is organic toxic matter, the hazardous No.: 84009. Trichloroethylene is one kind of anesthetic, it can strongly inhibit the central nervous system and cause vertigo, headache, nausea, vomit, etc. It is irritated to eyes and respiratory tract. It should be used in the good ventilating condition, the max concentration in air is 30mg/m3(TJ36-79).

Tetrachloroethylene  
CAS NO.:79-01-6

1.Molecular formula:
C2Cl4
Molecular weight165.82
2.Rational formula:
CCl2=CCl2
3.Appearance:
colorless transparent flow liquid, with chloroform-like odor.
4.Physical property:
¢Ù Boiling point121¡æ ¢Ú Relative density 1.623
¢ÛFlash point: No        ¢Ü Ignition point 347.1¡æ
5.Chemical property:
It is non-flammable matter, but it is fired if it is exposes to fire and high temperature for long time, and release the toxic & corrosive fume.
6.Uses:
It is one kind of important organic synthetic material, is widely used in the dry cleaning of garment, fur and textile, or used in the degrease of metal and extraction of grease.
7.Cautions:
It has the functions of irritation and anesthesia, the inhaling patient has the symptom of upper respiratory tract, tear and slobber.
8. Flammable & explosive danger:
It is non-flammable matter, with toxicity and irritation.

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