You drive off the water of hydration upon heating to get the anhydrous salt, then add water to the anhydrous salt to reform the hexahydrate. So, to answer your question, the dehydration and hydration of cobalt(II) chloride are reversible because by adding water to the anhydrous form you can reform the hexahydrate. This solution will contain hydrated #"Co"^(2+)# ions in the form #^(2+)#, and it will be light purple in color as well. The blue anhydrous salt will form the dihydrate first, then finally the hyxahydrate.ĭepending on how much water you add, you can form an aqueous solution of the hexahydrate. Company Identification: Acros Organics N.V. The hydration reaction will take place in the exact opposite direction. MSDS Name: Cobalt(II) chloride, anhydrous, 97 Catalog Numbers: AC214130000, AC214130050, AC214131000, AC214135000 Synonyms: Cobalt dichloride Cobaltous dichloride. The anhydrous salt is blue and the hexahydrate is light purple. Upon heating, the hexahydrate, which is light purple in color, will turn into the dihydrate form, #"CoCl"""_2 * 2"H"_2"O"#, which is violet in color, and eventually into the anhydrous form, which is blue in color. So, when you heat the the hexahydrate, you essentially drive off the water of hydration and keep the anhydrous cobalt(II) chloride, #"CoCl"""_2#. The hexahydrate is deliquescent, which means that it will continue to absorb water from it surroundings and eventually dissolve in the absorbed water. NOTOX1073/1335, Pg.Anhydrous cobalt(II) chloride, #"CoCl"""_2#, is actually hygroscopic, which means that it will readily attract water from its surroundings, usually moisture from the air, to form the hexahydrate #"CoCl"""_2 * 6"H"_2"O"#. Research and Consulting Company, Technical Reports. Journal of the American Pharmaceutical Association, Scientific Edition. 17, 1962.īEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLDīEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. SENSE ORGANS AND SPECIAL SENSES: VISUAL FIELD CHANGES: EYE SENSE ORGANS AND SPECIAL SENSES: OPTIC NERVE NEUROPATHY: EYE Intraperitoneal-guinea pig LDLo 165 mg/kgĪrchives of Environmental Health. "Abdernalden's Handbuch der Biologischen Arbeitsmethoden." Vol. JAMA, Journal of the American Medical Association. "Toxicology of Drugs and Chemicals," Deichmann, W.B., New York, Academic Press, Inc., 1969Vol. GHS Label elements, including precautionary statements Anhydrous cobalt(II) chloride is blue, while the hexahydrate is red-purple. GHS Classification in accordance with (OSHA HCS) 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 purum p.a., anhydrous, ≥98.0% (KT)Ĭlassification of the substance or mixture anhydrous ammonia rare earth metal salts and elemental bromine, fluorine, iodine. Nanoscale (See also Nanotechnology Information and Quantum Dots) elemental powders and suspensions, as alternative high surface area forms, may be considered. chloride ), potas- sium, aluminum, calcium, chromium, magnesium. Ultra high purity and high purity compositions improve both optical quality and usefulness as scientific standards. Cobalt Chloride 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 Chloride is an excellent water soluble crystalline Cobalt source for uses compatible with chlorides.
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