From two examples of sodium ethyl xanthate spillage in Australia, one resulted in evacuation of 100 people and hospitalization of 6 workers who were exposed to the fumes.
22.
In the Leuckart thiophenol reaction the starting material is an aniline through the diazonium salt ( ArN 2 X ) and the xanthate ( ArS ( C = S ) OR)
23.
In a 6-membered cyclic transition state the hydrogen atom is removed from the carbon atom ? to the xanthate oxygen in a " syn "-elimination.
24.
As an example, sodium ethyl xanthate may be added as a collector in the selective flotation of galena ( lead sulfide ) to separate it from sphalerite ( zinc sulfide ).
25.
An expert in radical chemistry, Zard and his group have notably worked on the xanthates, and contributed to the development of the reversible addition " fragmentation chain-transfer polymerization method.
26.
The xanthate is dissolved in aqueous sodium hydroxide ( typically 2-5 % w / w ) and allowed to depolymerize to a desired extent, indicated by the solution's viscosity.
27.
Since 1993, sodium ethyl xanthate is classified as a Priority Existing Chemical in Australia, meaning that its manufacture, handling, storage, use or disposal may result in adverse health or environment effects.
28.
An alcohol may also be converted to a better leaving group ( e . g ., xanthate ), so as to allow a milder " syn "-elimination such as the Chugaev elimination and the Grieco elimination.
29.
In 1823 while still in the small laboratory at N�rregade he identified a new family of sulfur-containing compounds, calling them xanthates ( xanthus, Greek " yellow " ) on account of the predominantly yellow colour of xanthate salts.
30.
In 1823 while still in the small laboratory at N�rregade he identified a new family of sulfur-containing compounds, calling them xanthates ( xanthus, Greek " yellow " ) on account of the predominantly yellow colour of xanthate salts.
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