Murexide and methyl red are investigated as promising enhancers of sonochemical destruction of chlorinated hydrocarbon pollutants.
2.
The solution is then filtered from the precipitated murexide, which is washed with absolute alcohol and dried.
3.
Murexide in its dry state has the appearance of a reddish purple powder, slightly soluble in water.
4.
Alloxan was used in the production of the purple dye murexide, discovered by Carl Wilhelm Scheele in 1776.
5.
In addition, he studied the nature of murexide and recognized it as the ammonium salt of purpuric acid.
6.
Murexide results from the condensation of the unisolated intermediate uramil with alloxan, liberated during the course of the reaction.
7.
Murexide is the product of the complex " in-situ " multistep reaction of alloxantin and gaseous ammonia.
8.
Common indicators are organic dyes such as Fast Sulphon Black, Eriochrome Black T, Eriochrome Red B, Patton Reeder, or Murexide.
9.
Murexide is used in analytical chemistry as a complexometric indicator for complexometric titrations, most often of calcium ions, but also for,,, and rare earth metals . " Cf ."
10.
It may also be prepared by digesting alloxan with alcoholic ammonia at about 78 �C; the purple solid so formed is easily soluble in water, and the solution produced is indistinguishable from one of murexide.
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