1. An indirect method of hydrolyzing some Amides utilizes nitrous acid

2. Nitrous acid converts it into benzoyl glycolic acid, C6H5C(=O)OCH2CO2H.

3. Aqueous nitrous acid is composed of only about \(5\%\) ions and \(95\%\) intact nitrous acid molecules A weak electrolyte is a solution in which only a small fraction of the dissolved solute exists as ions

4. This effect was used to determine the equilibrium of nitrous acid, methanol and methyl nitrite.

5. A corrosion-proofing composition comprising: a compound comprising a cement, an inorganic powdery material and a swelling material; a polymer emulsion selected from a styrene/butadiene copolymer emulsion and an acryl/styrene copolymer emulsion; and a nitrous acid salt.