Matheson Gas Products

W. Brake and A. L. Mossman, eds.. The Matheson Unabridged Gas Data Book, Matheson Gas Products, East Rutherford, N.J., 1974. 

Elydrogen Sulfide, MSDS, Matheson Gas Products, Montgomeryvihe, Pa., 1994. 

Trichlorofluoromethane (Freon 11) is available from E. I. duPont de Nemours and Company, Inc., or Matheson Gas Products. 

Nitrosyl chloride (Matheson Gas Products) with a purity specified as > 97% was used. Occasionally, the needle valve of the nitrosyl chloride tank clogs. After closing the tank, the valve is disconnected and flushed with acetone until the acetone remains colorless. The needle valve is reconnected after being dried with compressed air. 

FIGURE 0.43 Typical designs for gas storage cabinets (Matheson Gas Products, used with permission)... 

The checkers used acetylene available from Matheson Gas Products. The gas was purified by passing it through concentrated sulfuric acid and then through a tower filled with potassium hydroxide pellets. The gas was then passed into a 1-1. safety flask which was connected to the gas inlet tube by means of rubber tubing. The checkers used a rotameter that was calibrated with air to determine the flow rate of acetylene. 

Anhydrous ammonia, prepurified nitrogen, and prepurified hydrogen were all purchased from Matheson Gas Products. 

Anhydrous ammonia (99.98%) was obtained from Matheson Gas Products, Inc., and used as received. 

The submitter used methanethiol (b.p. 8°) obtained from Matheson Gas Products. The weight of the methanethiol distilled from the lecture bottle into the reaction flask was measured by difference. The pungent odor of this mercaptan is minimized by slow distillation of the reagent into the flask and by the use of a well-ventilated hood. The checkers used methanethiol (b.p. 8°, d 0.8948) obtained from Toyo Chemical Industries Co. (Japan) and changed the above procedure as follows methanethiol distilled from the lecture bottle was first trapped in an ice-cooled graduated flask equipped with a gas inlet and a dry ice reflux condenser, then 56 ml. of the liquid was redistilled into the reaction mixture. 

Cylinders of allene were purchased from PCR (Japan) or Matheson Gas Products (US). 

Braker, W. and Mossman, A.L. Matheson Gas Data Book (East Rutherford, NJ Matheson Gas Products, 1971), 574 p. 

High purity, research grade chlorine gas purchased from Matheson Gas Products was used, as was research grade carbon tetrachloride, toluene, and ethanol. 

The submitters dried the ethylamine and pyridine by distillation over potassium hydroxide pellets. The submitters used 600 ml. of petroleum ether, 113 g. (2.50 moles) of ethyl-amine, and 158 g. (2.00 moles) of pyridine to which was added 135 g. (1.00 mole) of sulfuryl chloride in 250 ml. of petroleum ether. In the United States ethylamine is sold in 100-g. quantities in sealed-glass vials (Eastman Organic Chemicals) or as the compressed gas in cylinders (Matheson Gas Products). The checkers used the contents of a freshly opened vial (without distillation) for each run as a matter of convenience. The checkers used either ])entane or petrolonm eth(M (b.p. 38-51°). 

Sulfur dioxide was purchased from Matheson Gas Products. It is convenient to use sulfur dioxide contained in a lecture bottle so that the small cylinder can be mounted on a balance allowing continuous measurement of the weight of sulfur dioxide added. 

Nickel car bonyl available from Matheson Gas Products was used by the checkers. 

A chemically pure grade of propylene obtained from Matheson Gas Products was employed. A large excess of propylene is used in this preparation since much of the olefin is converted to polymeric products. The submitters report obtaining markedly lower yields of product when an excess of propylene was not used. 

Available from Matheson Gas Products, P.O. Box 85, East Rutherford, NJ 07073. 

Available from Foote Mineral and Chemicals, Route 100, Exton, PA 19341. t Available from Matheson Gas Products, P.O. Box 85, 932 Paterson Plank Rd., E. Rutherford, NJ 07073. 

Mixtures of nitric oxide in nitrogen were obtained from Matheson Gas Products. High concentrations (250 ppm), factory analyzed to 5%, were diluted with air using standard gas mixing techniques. NO concentrations were calculated from N0 and air flow rates. 

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