Mercury compound, solid

DOT/UN/NA/IMCO shipping UN 2024 (mercury compounds, liquid) UN 2025 (mercury compounds, solid) IMO 6.1 (mercury compounds, liquid or solid) UN 2809 (DOT)b UN 1624 (mercuric chloride) IMO 6.1 (mercuric chloride) No data... 

STCC 49 232 69 (mercury compound, solid), 49 443 25 (mercury, metallic) 49 232 45 (mercuric chloride) 49 232 71 (mercuric chloride, solid) No data... 

Cinnabar Electron tubes containing mercury Mercuric salt Mercurous compound Mercury compound, liquid, n.o.s, 6.1 Mercury compound, solid, n.o.s., 6.1 Mercury contained in manufactured articles, 8 Mercury vapour tubes Phenylmercuric compound, n.o.s., 6.1 Quicksilver... 

Mercaptan Mixture, aliphatic 1228 28 Mercury Compounds, solid, n.o.s. 2025 53... 

Any solid mercury compound when fused with sodium carbonate yields a grey deposit of mercury. (Caution mercury vapour is formed.)... 

The low-potential responses are detected on Hg. Solid electrodes like glassy carbon, gold or platinum show no response in this range. This implies that oxidation of the mercury electrode takes place as well. Indeed, the second DPP waves observed at +0.68 up to +0.72 V correspond to oxidation of mercury compounds such as Ph2Hg. The... 

The Universal Demercurization Process, or UNIDEMP , is an ex situ process for removing mercury from a variety of solid and aqueous mercury waste streams such as metals, concrete, soils, asbestos, plastic, and cable as well as amalgams and mercury compounds. The process can also treat polychlorinated biphenyls (PCBs) and halogenated organics. UNIDEMP is a mobile system that volatizes and condenses mercury in a countercurrent rotating furnace at temperatures from 550 to 650°C. Celsius. 

A. M. Carro, I. Neira, R. Rodil and R. A. Lorenzo, Speciation of mercury compounds by gas chromatography with atomic emission detection. Simultaneous optimisation of a headspace solid-phase microextraction and derivatisation procedure by use of chemometric techniques, Chro-matographia, 56(11/12), 2002, 733-738. 

Finally, one more interesting reaction, the mercury-photosensitized polymerization of acetylene should lie mentioned. iShenvood and Gunning (1) showed that a stable mercury compound, probably a mercury carbide, forms in this reaction and that an optimum isotopic composition of 82% 2ll2Hg was obtained in the solid reaction product. These results suggest that, in addition to the primary step leading to the formation of an excited acetylene molecule which was proposed earlier (39), the following two additional primarv routes must also be considered (40) ... 

Contact of the gas with the solid oxidant causes ignition. See Other MERCURY COMPOUNDS, METAL HALOGENATES... 

The calibration step is critical. In general, the basic principle is always to use two independent calibration solutions. One of these can be made from pure chemicals, for example, Hg° dissolved in concentrated HN03 and diluted to the appropriate volume. For mercury, commercially available standard solutions can be used, but regular checks against a reference standard must be made. Certified reference materials (CRFs) should be used if available, but reference standards can also be prepared from pure mercury compounds. In the absence of aqueous-phase reference standards, solid materials may be used. 

Attention must be paid also to sample preservation to avoid perturbing the distribution of mercury compounds in the sample (Horvat 1996). The preservation of aqueous samples is often accomplished using acidification. However, suspended matter must be removed prior to acidification and dimethylmercury and Hg(0) have to be removed or else conversion of these species into methylmercury and mercury(II) can occur (Horvat 1996). For solid matrices, the preservation method of choice is freezing (Bloom 1993). Freezing preserves all major mercury species indefinitely, although coagulation will occur for sediments thus making it difficult to obtain representative subsamples of the sediment for... 

An extremely sensitive crystalline solid, which explodes on shaking with its crystallisation liquor, or upon gentle mixing when dry with copper oxide (for analysis). See other MERCURY COMPOUNDS... 

Crystallization bp Sublimation.—Volatile solids, as iodine, camphor, several metallic chlorides and mercurial compounds, arsenic, benzoic acid, iodide of lead, etc., when heated as directed in st(bHma/ton. yield vapors which, in cooling, take the form of crystals. 

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