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Mercury(II) thiocyanate (Hg(SCN) 2) is an inorganic chemical compound, the coordination complex of Hg 2+ and the thiocyanate anion. It is a white powder. It is a white powder. It will produce a large, winding "snake" when ignited, an effect known as the Pharaoh's serpent .
Common salts include the colourless salts potassium thiocyanate and sodium thiocyanate. Mercury(II) thiocyanate was formerly used in pyrotechnics. Thiocyanate is analogous to the cyanate ion, [OCN] −, wherein oxygen is replaced by sulfur. [SCN] − is one of the pseudohalides, due to the similarity of its reactions to that of halide ions.
The "Pharaoh's snake" or "Pharaoh's serpent" is the original version of the black snake experiment. It produces a more impressive snake, but its execution depends upon mercury (II) thiocyanate, which is no longer in common use due to its toxicity. [1] For a "sugar snake", sodium bicarbonate and sugar are the commonly used chemicals. [2]
mercury(II) hydride: 72172–67–9 Hg(IO 3) 2: mercury(II) iodate: 7783–32–6 HgI 2: mercury(II) iodide: 7774–29–0 Hg(NO 3) 2: mercury(II) nitrate: 10045–94–0 HgO: mercury(II) oxide: 21908–53–2 Hg(ONC) 2: mercury(II) fulminate: 628–86–4 HgS: mercury(II) sulfide: 1344–48–5 Hg(SCN) 2: mercury(II) thiocyanate: 592–85–8 ...
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As for how much mercury is dangerous, the exact number is up for debate. Per Ciarametaro, tissue concentration of 100 ng/mL of methylmercury or greater is commonly considered 'high'.
Mercury(II) thiocyanate: Hg(SCN) 2: 0.063: N and O. Substance Formula 0 °C 10 °C 20 °C 30 °C 40 °C 50 °C 60 °C 70 °C 80 °C 90 °C 100 °C ...
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