Nitrogen precautions

The compound is normally stored and transported as a water-wet paste which slowly decomposes at elevated ambient temperatures, evolving nitrogen. Precautions are described to prevent pressure build-up in sealed containers. 

The precautions stated are to avoid uptake of oxygen, nitrogen and other impurities which render the metal brittle the excess magnesium and magnesium chloride can be removed by volatilisation above 1300 K. 

Redistilled tetraethoxysilane containing less than 1 ppm chloride added to neutral 18 x 10 H water purged with nitrogen ia fluorocarbon bottles does not hydroly2e to a gel for over 6 months (10). Without special precautions, tetraethoxysilane hydroly2es to a gel ia - 10 d tetramethoxysilane... 

Many austenitic stainless steels have failed during downtime because the piping or tubes were not protected from chlorides. A good precaution is to blanket austenitic stainless steel piping and tubing during downtime with an inert gas (nitrogen). 

All precautions with regard to the purification of tetrahydrofuran, the quality of the iron powder, the rapid stirring, the maintenance of a nitrogen atmosphere, and the handling of cyclopentadiene, described in the preceding preparation, are followed. 

In the laboratory, a range of slush baths may be used for speciality work. These are prepared by cooling organic liquids to their melting points by the addition of liquid nitrogen. Common examples are given in Table 8.2. Unless strict handling precautions are instituted, it is advisable to replace the more toxic and flammable solvents by safer alternatives. 

A special precaution is imperative in handling elemental fluorine and chlorine tnfluoride. Both gases are extremely corrosive and so reactive that they are very seldom used without dilution with inert gases such as nitrogen, helium, or argon. Fluorine is now available in mixtures with nitrogen. Fluorine is very toxic in... 

Aluminium can be deposited from complex organic solutions if sufficient precautions are taken, and such coatings are now being produced commercially in North America. Two of the systems on record are (1) aluminium trichloride and lithium aluminium hydride dissolved in diethyl ether used at 40°C and 50A/m, and (2) aluminium chloride, n-butylamine and diethyl ether used at 20°C and 970 A/m. Deposits of 0-010 mm can be obtained on mild steel or copper at 20°C and 970 A/m using aluminium-wire anodes and nitrogen or argon atmospheres. 

The checkers observed that rather rapid decomposition of the product occurs unless precautions were taken. A short path distillation using a 50-ml. distilling flask equipped with a capillary nitrogen bubbler was employed. 

The inspector should personally examine the safety precautions before entering a boiler. He or she should not work in isolation (an inspection attendant should be available, who has a means of summoning assistance and facilitating a rescue without personally entering the boiler), or under particularly hot or poorly ventilated conditions (pockets of nitrogen or volatile amine can be dangerous). 

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