8/25/2023 0 Comments Cobalt dichlorideDo NOT let this chemical enter the environment. Carefully collect remainder, then remove to safe place. Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber Contaminated packaging: Dispose of as unused product.|Sweep spilled substance into containers if appropriate, moisten first to prevent dusting. Contact a licensed professional waste disposal service to dispose of this material. If it is possible or reasonable use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity or environmental contamination.|Product: Offer surplus and non-recyclable solutions to a licensed disposal company. Ultimate disposal of the chemical must consider: the material's impact on air quality potential migration in air, soil or water effects on animal, aquatic and plant life and conformance with environmental and public health regulations. SRP: Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Water indicator, especially in desiccantsĬobalt dichloride is a strong allergen, with a LD 50 of 80 mg/kg (rats).Įye and hand protection should be worn while handling this compound.Ĭobalt(II) chloride should be stored in an airtight container or bag to counter its strong hygroscopic nature.Ĭobalt dichloride should be converted to an insoluble form before disposal.Decomposes at 400 ☌ on long heating in air sublimes at 500 ☌ in HCl gas forming iridescent, fluffy, colorless crystals turns pink on exposure to moist air|Cobaltous chloride hydrolyzes in aqueous solution to extent of 0.11% at 0.062 molar and 0.17% at 0.031 molar.|Mol wt: 237.93 red monoclinic crystals density: 1.924 at 25 ☌/25 ☌ MP: 86 ☌ (loses 6H2O) soluble in alcohol (blue color) solubl in acetone /Cobaltous chloride hexahydrate/|Monoclinic crystals pink to red, slightly deliquescent, monoclinic, prismatic crystals melting point 87 ☌ density: 1.924 at 20 ☌ soluble in water, alcohols, acetone, ether, glycerol pH of 0.2 molar aqueous solution: 4.6 the aqueous solution is pink to red, but turns blue when heated or when HCl or H2SO4 is added /Cobalt(II) chloride hexahydrate/|On heating loses 4H2O at 52-56 ☏orming the dihydrate, violet or blue crystals, specific gravity at 25 ☌ referred to water at 25 ☌: 2.477 stable unless exposed directly to moisture loses another water by 100 ☌ giving the monohydrate violet, hygroscopic, amorphous solid or needles remaining water lost at 120-140 ☌ /Cobalt(II) chloride hexahydrate/|Ruby red crystals /Cobaltous cloride hexahydrate/|Heat of solution: 22 BTU/lb = 12 cal/g = 0.50X10+5 J/kg|Heat of fusion: 56.9 cal/g|For more Other Experimental Properties (Complete) data for Cobaltous chloride (8 total), please visit the HSDB record page.Cobalt chloride can be used for the synthesis of many complexes, such as Hexamminecobalt (III) chloride and Potassium cobaltinitrite.It can also be found in some types of colored silica gel, though the amount is small.Ĭobalt(II) chloride, along with other cobalt(II) compounds is classified as "Substance of very high concern" in the EU and its sale is regulated. If heptahydrate crystals are desired the solution may be dried in a desiccator.Ĭobalt(II) chloride can be purchased from chemical suppliers, both as a solid and as a solution. Usually, there will be a layer of unreacted cobalt carbonate/other contaminants that must be filtered out using either vacuum or gravity filtration in order to receive a pure product.īy heating this solution to dryness a light blue powder will be formed which is anhydrous cobalt chloride. Add a small amount of acid and then stir the mixture before adding another small portion, as the CO2 created can cause the mixture to overflow. The density for the three forms is 3.356 g/cm 3 (anhydrous), 2.477 g/cm 3 (dihydrate), 1.924 g/cm 3 (heptahydrate).Ĭobalt chloride heptahydrate can be synthesized by reacting two moles of hydrochloric acid with one mole of cobalt carbonate. CoCl 2 is soluble in water (52.9 g/100 mL at 20 ☌) methanol (38.5 g/100 mL), and slightly soluble in acetone, diethyl ether. The compound melts at 735 ☌ (anhydrous), 100 ☌ (dihydrate), 86 ☌ (hexahydrate). Cobalt(II) chloride is a salt that is blue when anhydrous and pink-purple when hydrated.
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