Amount of substance in use in chemical engineering in the United States is the pound-mole, having the symbol lb-mol. One pound-mole is . When quoting an amount of substance, it is necessary to specify the entity involved, unless there is no risk of ambiguity. One mole of chlorine could refer either to chlorine atoms, as in 58.44 g of sodium chloride, or to chlorine molecules, as in 22.711 liters of chlorine gas at STP. The simplest way to avoid ambiguity is to replace the term "substance" by the name of the entity or to quote the empirical formula. For example: Amount of substance
Organocadmium compound to be carcinogen to humans by the IARC. Organocadmium compound An organocadmium compound is an organometallic compound containing a carbon to cadmium chemical bond. Organocadmium chemistry describes physical properties, synthesis, reactions and use of these compounds. Cadmium shares group 12 with zinc and mercury and their corresponding chemistries have much in common. Dimethylcadmium consists of linear molecules with C-Cd bond lengths of 213 pm. All organocadmium compounds are sensitive to air, light and moisture. The first organocadmium compounds, dimethylcadmium, CH-Cd-CH, and diethylcadmium, CHCH-Cd-CHCH, were prepared in 1917 by Erich Krause. In general, they are prepared by transmetalation or by an