from The Century Dictionary.
- noun In chem., a prefix showing that the compound named is an azo compound containing hydroxyl in one of the radicals, as in
oxyazobenzene, C6H5N2C6H4.OH: same as hydroxyazo-, which is to be preferred.
Sorry, no etymologies found.
It is essential that this solution should be tested before use, and this is carried out by coupling it with an alkaline phenol solution; if a dark blue oxyazo colour is formed, the solution may be used.
The oxyazo reaction only succeeds when the solution has been boiled with a few drops of hypochlorite solution, quickly cooled and excess of ammonia added.
The constitution of the oxyazo compounds has attracted much attention, some chemists holding that they are true azophenols of the type R·N_2·R_1·OH, while others look upon them as having a quinonoid structure, _i. e._ as being quinone hydrazones, type R·NH·N: R_1: O.
-- The oxyazo compounds are prepared by adding a solution of a diazonium salt to a cold slightly alkaline solution of a phenol.