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Nessler's reagent, named after Julius Neßler (Nessler), is a 0.09 mol/L solution of potassium tetraiodomercurate(II) in 2.5 mol/L potassium hydroxide.This pale solution becomes deeper yellow in the presence of ammonia (NH 3).
In the late 1950s, Shannon Airport was dependent on transit passengers and refuelling for trans-Atlantic flights. [2]: 55 With indicators that commercial aircraft would soon have the range to bypass the airport, the airport's then director, Brendan O'Regan, submitted a proposal for a special manufacturing and tax incentive zone to be created in the vicinity of the airport.