Rohrbach's solution (Sushin's liquid) - solution - an aqueous solution of barium tetraiodomercurate GOST 4331-78 (aqueous solution of a double salt of diode mercury and barium diode ) [1] .
Yellow liquid. Maximum density 3.5 g / ml at n.a. (MPC 0.5 mg / m 3 ). The solution was proposed by the German chemist C. Rohrbach in 1883 as a heavy liquid .
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All mercury compounds are extremely toxic, cause chronic poisoning - mercurialism (mercury poisoning) (MPC 0.05 mg / m 3 ) [2] .
Application
Due to its density, it is used in mineralogical analysis to separate the grains of minerals according to their density. To obtain a liquid of lower specific gravity, water is poured onto the surface of a concentrated Rohrbach solution and left alone until diffusion is complete. With inaccurate dilution, the liquid quickly decomposes with the release of red diode mercury .
Notes
- ↑ Kopchenova E.V. Mineralogical analysis of concentrates. Moscow 1951
- ↑ Harmful substances in industry. Directory. Volume 3 "Inorganic and elementorganic compounds" - L .: "Chemistry" 1977
Literature
Chemical Encyclopedic Dictionary. Ch. red I.L. Knunyants - M .: "Soviet Encyclopedia" 1983