How does the structure change as water molecules are added?Īnhydrous CoCl 2 has the same structure as cadmium chloride, CdCl 2. Silica gel is sometimes supplied containing some cobalt chloride, which indicates the water content – blue when it is dry, pale pink when the air round it is damp. When you heat the gel, it loses the water so you can reuse it. Yes, they are put in with various consumer products, like electrical goods, shoes and handbags, to absorb water, because silica gel can absorb up to about 40% of its weight in water. Silica gel? You mean the stuff that comes in little bags with a warning not to eat them? It can be used as a humidity indicator in weather-measuring instruments, as well as in self-indicating silica gel. You can get an indicator paper – like litmus paper but containing cobalt chloride - which changes colour from blue to pink in the presence of water. This can again be reversed by adding water. If you warm pink CoCl 2.6H 2O gently – up to 150☌ or so - it will gradually lose water forming the violet CoCl 2.2H 2O, then blue anhydrous CoCl 2. You can reverse these changes with solid cobalt chloride crystals. First the purple dihydrate, CoCl 2.2H 2O, forms and then at higher humidity the pink hexahydrate CoCl 2.6H 2O is the product. Anhydrous cobalt chloride, CoCl 2, is blue in colour. It is an unusual material in the way it changes colour, particularly in the presence of water. Why be interested in cobalt chloride anyway? You can also obtain isolated CoCl 2 molecules in matrices of argon and nitrogen at low temperatures too (the unreactive Ar atoms and N 2 molecules come between CoCl 2 molecules, ‘spacing them out’). Electron diffraction measurements show that it is a linear molecule with Co-Cl distance of 2.113 Å. True, but this picture shows the structure of an isolated CoCl 2 molecule in the gas phase at around 1000 K. Why? Everyone knows that a metal and a non-metal form ionic bonds and have giant structures. 1998COBALT CHLORIDE - Molecule of the Month June 2016 - JSMol versionĬOBALT CHLORIDE A drug used to dope racehorses that's also a water indicator. Research and Consulting Company, Technical Reports. 235, 1969.Įnvironmental Quality and Safety, Supplement. Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. SKIN AND APPENDAGES (SKIN): "DERMATITIS, OTHER: AFTER SYSTEMIC EXPOSURE" GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA"įood and Chemical Toxicology. GHS Label elements, including precautionary statements GHS Classification in accordance with (OSHA HCS) Eur., 99-102%Ĭlassification of the substance or mixture We also produce Cobalt Chloride Solution.American Elements produces to many standard grades when applicable, including Mil Spec (military grade) ACS, Reagent and Technical Grade Food, Agricultural and Pharmaceutical Grade Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards.Ĭobalt(II) chloride hexahydrate puriss. Nanoscale (See also Nanotechnology Information and Quantum Dots) elemental powders and suspensions, as alternative high surface area forms, may be considered. Ultra high purity and high purity compositions improve both optical quality and usefulness as scientific standards. Cobalt Chloride hexahydrate is generally immediately available in most volumes. They can form either inorganic or organic compounds. The chloride ion controls fluid equilibrium and pH levels in metabolic systems. Ultra high purity and proprietary formulations can be prepared. They are formed through various chlorination processes whereby at least one chlorine anion (Cl-) is covalently bonded to the relevant metal or cation. Chloride materials can be decomposed by electrolysis to chlorine gas and the metal. Chloride compounds can conduct electricity when fused or dissolved in water. Use: Cobalt(II) Chloride Hexahydrate is an excellent water soluble crystalline Cobalt source for uses compatible with chlorides.
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