8 years on Allbiz
Nessler's reagent (K2HgI4 • KOH or K2HgI4 • NaOH) - represents aqueous caustic solution of dihydrate of tetraiodomerkurat (II) potassium. Externally it is the liquid of pale yellow color decaying under the influence of light. Nessler's reagent is widely applied in laboratory practice to photometric definition and detection of NH3 at 436 nanometers (el 2.106). Besides, ability of Nessler's reagent to form metal mercury causes its use for detection of aldehydes and alcohols, and also identifications of such substances as hydroxyamino acids in thin and paper chromatography. Nessler's reagent is not vzryvo-or flammable substance and therefore it can be transported by all means of transport providing such opportunity.
Nessler's reagent is mercury the containing substance that causes its virulence. Class of danger of preparation 6. It is necessary to prevent hit of preparation on skin and mucous, and also in human body. All works with reactant are carried out indoors with extract.
Nessler's reagent represents the toxic agent capable to cause severe poisoning of organism, and also serious irritations of integuments and mucous nasopharynxes and eye. In case of poisoning it is necessary to address in medical aid station of the enterprise or organization.
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