Nitrosulfonic acids

It is to be observed that other m-nitrosulfonic acids also form very insoluble fenous salts. One example is 2-nitro-4,8-naphthalenedisulfonic acid wmch can be obtained in a pure state very easily by this method. This method of separation has long been known in the industry. For information about 2-naphthylamine-4,8-disulfonic acid, see page 219 ff. 

The sulfite formed can exert a reducing action when easily reducible groups are present. For this reason, alkali fusion of nitrosulfonic acids rarely works well. Sometimes this redudng action can be counteracted, especially in the anthra-quinone series, by the addition of an oxidizing agent or an all ne earth hydroxide in the latter case, the sulfite is precipitated as an insoluble salt and thus rendered harmless. 

Formation of hyponitrous acid (H2N2O2) from the acid-catalyzed hydrolysis of nitrosulfonic acid. 

Reaction of nitrosulfonic acid with nitrous acid to form sulfates and liberate NO. 

Figures 1-4, 5, and 6 show the time-resolved concentration of species in a batch reactor at various pH s, temperatures, and initial partial pressures of SO2 and N0X for the first 2 and 24 hours respectively. The gas-to-liquid ratio (G/L) is 75. Figure 1 (at Ps02 = 1000, Pjjo = 450, and PNO2 = 50 ppm, pH = 5, and T = 328K) demonstrated that the removal efficiency of NO is only about 10%, although NO2 can be removed nearly completely. This is because NO alone cannot be converted into nitrous acid. The major product is HADS within the initial 1-1/2 hr the concentrations of HAMS and sulfate increase while that of HADS decreases as the reaction time continues. If the reaction is allowed to continue, the final products will be NH4+, N2, and sulfate. Because we disregard the reaction of HAMS and HA with HNO2 and the hydrolysis of nitrosulfonic acid, no N2O is formed.

The lability of the bromine in l-bromopyrrolo[l,2-a]quinoxaline (101) makes the reaction of the nitrosulfonic acid 109 more complex in both concentrated hydrobromic acid and in DMF containing lithium bromide. In the reaction of 109 with lithium bromide the l-bromo-3-sulfonic acid 112 may be isolated after 10 min. However after 1 hr only the 3-bromo compound 100 is obtained. It was also shown that the intermediate 112, as well as the 1-bromo compound 101 and l,3-dibromopyrrolo[l,2-a]quinoxaline, form the 3-bromo compound 100 on reaction with lithium bromide in DMF. ... 

EINECS 231-964-2 Lead chamber crystals Nitro acid sulfte Nitro-sulfonic acid hlitrose Nitrososulfuric acid Nitrosulfonic acid Nitrosylsulfuric acid Nltrosylsulphuric acid Nitroxylsulfuric acid Sulfuric acid, monoanhydride with nitrous acid UN2308 Weber s acid. Used to bleach flour. Crystals dec 73°. 

Grummt, T. Wunderlich, H. Chakraborty, A. Kundi, M. Majer, B. Ferk, F. Nersesyan, A. K. Parzefall, W. Knasmueller, S. Genotoxicity of nitrosulfonic acids, nitrobenzoic adds, and nitroben-zylalcohols, pollutants commonly found in ground water near ammunition facilities. Environ. Mol. Mutagenesis 2006, 47, 95-106. 

Kiprianov (1957) studied the relative rates of formation of quaternary salts of 2-methylbenzothiazole with methyl iodide, methyl sulfate, and methyl esters of sulfonic acids and p-nitrosulfonic acids. He found that the reaction with methyl 2-nitrobenzenesulfonate was six times faster than that with Me2S04, while the methyl esters of the 2,3- and 2,4-dinitrobenzenesulfonic acid reacted sixty times more rapidly than did Me2S04. Such esters afford a method for very mild alkylation of very weak bases (Kip>rianov Tolmachev 1957). 

Phosphorus pentachloridefstannous chloride Aminomercaptans from nitrosulfonic acids... 

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