Nitriting mixture

With lower hydrochloric acid concentration and reversal of the mode of addition, i.e., acid to indanone-nitrite mixture, the intermediate 2-methyl-2-nitroso-l-indanone may also be isolated as its dimer. This can be isomerized to the isocarbostyril rapidly in refluxing methanolic sodium methoxide and more slowly in concentrated hydrochloric acid.4... 

This method is particularly useful for aromatic aminocarboxylic and aminosulfonic acids, which are often only sparingly soluble in dilute acid. The amino compound is dissolved in water or in weak alkali and combined with a stoichiometric amount of sodium nitrite, upon which the resulting solution is poured into a mixture of acid and ice. Alternatively, the process may be reversed by pouring the acid into the amine-nitrite mixture. 

Another method of preparing pure nitric oxide is to heat nitrate-nitrite mixture with a metal oxide in a lower oxidation state ... 

It is further recommended that amine-nitrite mixtures be kept away from electrophilic carbonyl compounds and gem-di-halides capable of supporting immonium ion formation, for example in the preservation of amine-rich fish products with formaldehyde ( ) or in the use of methylene chloride as an aerosol propellant (13). It also seems advisable to avoid storing treflan and related herbicides in the presence of... 

Oxidants. Oxidized violently or explosively in contact with hot oxidants. Sodium Nitrite. Mixture explodes on heating.3... 

Amyl nitrite is a yellowish liquid with an ethereal odor and a pungent taste. It is volatile and inflammahle at mom temperature. Amyl nitrite vapor forms an explosive mixture in air or oxygen. Inhalation of the vapor may involve definite explosion hazards if a source of ignition is pre.sent. as both room and htxly temperatures are within the flammability range of amyl nitrite mixtures with either air or oxygen. It is nearly insoluble in water but is miscible with organic-solvents. The nitrile also will decompo.se into valeric acid and nitric acid. 

To use this variation, the ethyl nitrite is first prepared as described above. The cold temperature is important to get best yields of the nitrite. Then the nitrite reaction mixture is poured into a suitable size round bottom flask, the glassware is set up as shown in Figure 8, and heat is applied to the nitrite mixture to bubble its vapors into the phenylacetone production reaction flask. Cold water should not be run through the condenser, as this may hold back the nitrite. Instead, the water should be room temperature. The nitrite solution will have to be heated to almost boiling to get the last of the nitrite to boil out of it. A yield of about 60 grams of ethyl nitrite can be expected from the directions given above. 

Amyl Nitrite. Mixture of isomers containing not less than 97.0% and not more than 100,0% of CjH, NO,. Consists chiefly of isoamyl nitrite [(CHj) CHCH2CH2ONOt, but other isomers are also present. The N,F, grade has di) 0.870-0,876. See Isoamyl Nitrite. 

Gustafsson L. 1984. Interferences in the determination of total nitrogen in natural waters by photo-oxidation to nitrate-nitrite mixture. Talanta 31 979-986. 

CHLORATE and BORATE MIXTURES 1487 35 POTASSIUM NfTRATE and SODIUM NITRITE MIXTURE... 

State of the art alkali nitrate/nitrite mixtures 2 Single salt NaNOj 306 °C KNO3 334 °C... 

Novel alkali nitrate/nitrite mixtures 5 Quaternary additive, common anion quaternary reciprocal Ca(N03)2-KN03-LiN03-NaN03 105 °C Li, Na, K//NO2, N03 80°C... 

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