Calomel Carbon dioxide

BIS (AMMONIUM) CARBONATE (506-87-6) (NH4)2COj Slightly combustible solid (Fire Rating 1). Contact with sodium hypochlorite causes sudden, possibly violent, decomposition. Becomes unstable and decomposes on exposure to air or in heat with loss of ammoiua and carbon dioxide, converting to powdery-white ammonium bicarbonate. Inconpatible with acids, acid salts, alkaloids, aluminum, calomel, iron salts, sodium nitrate, nitrites, zinc. Attacks nickel, copper, and other alloys. 

The constituents of a carbon dioxide electrode are (1) a conventional glass pH electrode with a calomel reference electrode, (U) a thin plastic or teflon membrane which is permeable to ceirbon dioxide and not to other ions, and (tU) a standard bicarbonate solution, usually 0.005 M NaHC0 between the membrane and the glass electrode. 

The side products of the reaction include ethylnitrate, ethylnitrite, oxalic acid, nitrogen oxides, and carbon dioxide. The raw MF ordinarily contains metallic mercury, mercuric oxalate, calomel, and mother liquor enclosed in crystals [15]. Traces of free mercury can be removed from MF by evaporation by placing it in vacuum desiccator for a few days [38]. The only industrially used method of preparation of MF is the one described above. The technology is described in great detail in the literature [3, 15, 35, 42, 48]. 

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