Danger! The carbide is oxidized with incandescence on warming with lead oxide. The EU Ecolabel may not be awarded to substances or mixtures classified as such. A., Chem. V. Sudarsan, in Functional Materials, 2012. The molecular formula identifies each type of element by its chemical symbol and identifies the number of atoms of each element found in one discrete molecule of the substance. This site is not fully supported in Internet Explorer 7 (and earlier versions). Once cool, remove from the alumina crucible and crush the powder cake, using a mortar and pestle, to produce a coarse powder. To a first approximation, the Pb2+ ions can be considered as cubic packed. This list contains environmental quality standards (EQS), including annual averages and maximum allowable concentrations, for priority substances and certain other pollutants as provided for in Article 16 of Directive 2000/60/EC. This is unique source of information on the chemicals manufactured and imported in Europe. Non-Exhaustive List of Banned Substances, Directive 94/33/EC on Young People at Work, 20 August 1994, as amended by Dir 2014/27/EU, March 5, 2014 (Based on Table 3 of Annex VI to CLP, inter alia), EU. the heating rate of the upper crucible is faster than the lower part, then oxygen deficiency inside the sealed crucible will occur when the temperature at the lower segment of the crucible ramps up to around 520 °C. (1989) embodied this idea in their concept of surface building blocks, which comprise charge-neutral, repeating units. This substance has been identified as member of the following groups of substances: Welcome to the ECHA website. For (PbO)x[(Na2O)0.25(SiO2)0.75]1−x glass having 10 mol% PbO, a broad emission peak around 400 nm is observed, on excitation at 290 nm (Fig. Figure 8.3(a)–(d) shows the UV–visible optical absorption patterns of ternary (PbO)x[(Na2O)0.25(SiO2)0.75]1−x glasses with 0.10≤x≤0.25. Hence, a similar rumpling relaxation is expected. With the increase in PbO concentration, some Pb2+ ions along with Na+ ions are incorporated into the network-modifying positions in the glass [12]. A similar shoulder was also observed for many glasses containing heavy-metal oxide, as reported by Liu et al. This orientation must follow the conditions: (001) plane of tet-PbO parallel to the intial (001) plane of orthorhomb-PbO, and (110) plane of tet-PbO parallel to the (100) plane of orthorhomb-PbO. The freshly produced leady oxide powder has elevated temperature and high reactivity. 4(1) Restrictions, Annexes III & IV, Substances of very high concern identification, Recommendation for the Authorisation List, Getting started with EU chemicals legislation, Classification of substances and mixtures, Harmonised classification and labelling (CLH). Within the sandwich, each Pb2+ ion is located at the top of a PbO4 pyramid and all the Pb–O distances are identical and equal to 2.32 Å. Lead oxide (PbO)-containing glasses are technologically important and are potential candidates for making electron multipliers, ultra-low loss wave guides, glass-to-metal seals, IR transmitting devices and optical gratings [3–6]. This is again attributed to the strong spin–orbit interaction brought about by the higher number of electrons and orbitals for Pb2+ ions (compared with Na+ ions) with excited luminescence centres (triplet state). Such notifications are required for hazardous substances, mixtures, or articles, manufactured or imported at over 1 kg per annum. Lead oxide and lead dioxide thin films have been obtained by a variety of techniques, such as thermal evaporation, 212 exposing lead films to RF oxygen plasma or oxygen, 213 laser-assisted deposition, 204 atomic layer epitaxy, 214 ALD, 215 and metal-organic CVD (MOCVD). The commercial lead oxide (PbO) generally contains some Pb3O4. Lead Sub-Oxide, also commercially known as Grey Oxide / LSO is used extensive for preparation of plates in lead acid batteries. It also captures certain labeling requirements on such products containing mercury, cadmium and lead above specified quantities. Description: Inorganic lead includes lead oxides, metallic lead, lead salts, and organic salts, such as lead soaps; but excludes lead arsenate and organic lead compounds.


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