Nitrous acid physical

Nitric oxide is made commercially by oxidation of ammonia above 500°C in the presence of platinum, or by reduction of nitrous acid with ferrous sulphate or feiTous halides. The physical ... 

In the foregoing essays I have endeavoured to prove as clearly as is possible by physics and chemistry, that the very pure air which Dr. Priestley has denominated dephlogisticated air, enters, as a constituent part, into the composition of several acids, and especially into that of the phosphoric, vitriolic, and nitrous acids. 

The nitration of purines gives 8-nitropurines. 8-Nitrotheophylline and 8-nitrotheobroniine are obtained with nitrous acid. Caffeine, 3-methylxanthine, and 9-methylxanthine can also be converted directly by various types of nitric acid into their 8-nitro derivatives, though in most cases yields and detailed physical data have not been reported. Thus, 9-methylxanthine is converted to 9-methyl-8-nitroxanthine (1) on heating in 50% nitric acid. ... 

Freri478,480 has reported a very interesting synthesis of 4-oximino-3-methyl-2-pyrazolin-5-one. This consisted in the treatment of citra-conic acid hydrazide with nitrous acid (eq. 211). The physical data which... 

A mutagen is a physical agent or chemical reagent that causes mutations. For example, nitrous acid reacts with some DNA bases, changing their chemistry and hydrogen bonding properties, and is a mutagen. 

Allan, G.G. and Peyron, M. 1989. The kinetics of the depolymerization of chitosan by nitrous acid. In Chitin and Chitosan Sources, Chemistry, Biochemistry, Physical Properties, and Applications (G. Skjak-Braek, T. Anthonsen, and D. Sandford, eds), pp. 443 166. Elsevier Applied Science, New York. 

Trick, S. (2004) Formation of nitrous acid on urban surfaces-a physical-chemical perspective. 

Physical Properties Yellow-brown liquid to reddish brown gas generally a mixture of NO2 and N2O4 (at - 11 °C liquid is 0.01% NOj, at 21 °C hquid is 0.1% NO2 and gas is 15.9% NOj) bp 21 °C, mp -11 °C Miscible in aU proportions with water reacting to form nitric and nitrous acids... 

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