Methyl chloride cylinders

Methyl chloride is led from a commercial cylinder to the bottom of the test tube used for measuring and storing the... 

The checkers also obtained equally good results with less effort by allowing a slow stream of dry methyl chloride to pass directly from the commercial cylinder into the reaction mixture until practically all the magnesium had reacted. 

Methyl Chloride, Chlor-methane, CH3CI, is a gas, boiling at — 237°. It may be compressed in cylinders in which form it is used as a methylating reagent in the manufacture of dyes. It is also used for producing low temperatures and as a local anesthetic. 

Alcohol consumption increases toxic effects. Turn leaking cylinder so that leak is on top to prevent liquid methyl chloride escaping. 

A secondary standard is prepared by mixing the substances in a dilution chamber with a voliune of more than 10 m. The larger the better, since the final concentrations of individual components have to be very low. Most of the halocarbons are liquids at room temperature, and are mixed at about the same relative ratios as found in seawater. The gaseous methyl chloride, methyl bromide and CFC-12 are released into the dilution chamber from glass ampoules. The toxicity of methyl halides deserves special attention. An evacuated stainless-steel cylinder, electropolished inside, with a volume of 1-5 L, is opened in the chamber. The gas mixture let into the cylinder is then pressurised with nitrogen gas to reach the required concentration level (mixing ratio). 

Use methyl chloride in a well-ventilated area only, preferably using a hood with forced ventilation. The cylinder should never be directly connected to a container of liquid since reverse flow can occur causing a reaction within the cylinder. To prevent reverse flow, a trap, check valve, or vacuum break should be inserted into the line. Cylinders of methyl chloride should be stored and used only in well-ventilated areas away from heat and all sources of ignition such as flames and sparks in order to avoid fire and explosion hazards. Flames should never be used to detect methyl chloride leaks use a soapy water solution. Do not use methyl chloride around sparking motors or other nonexplosion-proof equipment. Reserve stocks of methyl chloride cylinders should not be stored with... 

Methyl chloride may be absorbed from leaking cylinders into a suitable organic solvent such as xylene, toluene, benzene, or chloroform after attachment of the appropriate regulator and flexible tubing. It may subsequently be recovered for use, or it may be disposed of in a manner suitable for disposal of a flammable gas and in accordance with federal, state or provincial, and local regulations [4]. 

Methyl chloride is authorized for shipment in cylinders, insulated single-unit tank cars, and TMU tanks and tank cars. It is also shipped in tank barges. Methyl chloride is also authorized for shipment in portable tanks and cargo tanks. 

Natural gas, which is mostly methane, is widely used as a fuel. In the chemical industry, methane is used heavily as a raw material for making important products that include acetylene, ammonia, ethanol, and methanol its chlorination also yields carbon tetrachloride, chloroform, methyl chloride, and methylene chloride. It is used to produce carbon black for use in the manufacture of rubber products and printing inks. The burning of high-purity methane is used to make carbon black of special quality for electronic devices. Natural gas has seen limited use as a motor fuel handled as a compressed gas in high pressure cylinders or liquid dewars. 

Cylinders authorized for methyl chloride service must be requalified by hydrostatic re-... 

Authorized pressure relief devices for methyl chloride cylinders are TVpe CG-7 pressure relief valves. [8]... 

The standard valve outlet connection in the United States and Canada for methyl chloride cylinders is Connection CGA 510. The limited standard connection for methyl chloride cylinders is Connection CGA 660. [9]... 

---