English
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Co24%
W&Q
1. Molecular Formula: CoCl2.6H2O
2. Property: Pink or mauve crystal belonging to monoclinic system, density: 1.924g/cm3, melting point: 86°C, stable under room temperature. It turns blue when heated and turns red in the moist air by cooling.
3. Sepcification(%):
Co | 24min |
Fe | 0.001max |
Ni | 0.001max |
Zn | 0.001max |
Ca | 0.001max |
Cu | 0.001max |
Mn | 0.001max |
Mg | 0.001max |
Na | 0.001max |
W.I.M | 0.02max |
W&Q's Cobalt(II) chloride hexahydrate, with the chemical formula CoCl₂·6H₂O, is a highly hygroscopic, crystalline inorganic salt. It is one of the most common and commercially significant cobalt compounds, renowned for its distinctive color-changing properties and wide range of applications.
1. Exceptional Solubility and Reactivity
It exhibits very high solubility in both water and polar organic solvents (like ethanol and acetone). This offers superior formulation flexibility in processes requiring concentrated cobalt ion solutions or non-aqueous media, giving it an edge over sulfates in certain chemical syntheses and specialized electroplating baths.
3. Superior Source of Cobalt Ions in Electroplating
In electroplating applications, chloride ions often improve solution conductivity and anode corrosion, leading to more efficient plating operations. Cobalt chloride hexahydrate can enable higher current densities and produce smooth, dense, and high-quality cobalt or cobalt-alloy deposits, particularly for functional or magnetic coatings.
4. Versatility as a Catalyst and Chemical Precursor
The chloride anion can act as a Lewis acid catalyst or a ligand in coordination chemistry. This makes cobalt chloride a preferred catalyst or precursor in important organic reactions (e.g., the synthesis of pharmaceuticals, fine chemicals) and industrial processes like the Fischer-Tropsch synthesis, where it often outperforms sulfate analogues.
5. High Effective Cobalt Content for Nutritional Use
With a cobalt content of approximately 24.7%, it provides a concentrated source of bioavailable cobalt ions. When used as a trace mineral supplement in animal feed or fertilizers, it is highly effective in preventing cobalt deficiency, though regulatory acceptance varies by region compared to sulfates.
Humidity & Moisture Indicator: Due to its vivid color change, it is impregnated into silica gel or paper to create self-indicating desiccants (blue when dry, pink when saturated) and used in humidity test cards.
Electroplating & Surface Treatment: Serves as a primary source of cobalt ions in electroplating baths for producing hard, wear-resistant, and magnetic cobalt or cobalt-alloy coatings.
Catalyst & Chemical Synthesis: Acts as a catalyst or precursor in various organic reactions (e.g., oxidations, hydrocarbon synthesis via Fischer-Tropsch) and inorganic synthesis.
Nutritional Supplement: Used in trace amounts in animal feed (for ruminants) and as a source of cobalt in fertilizer to correct soil deficiencies, similar to cobalt sulfate.
Laboratory Reagent: A common source of Co⊃2;⁺ ions in analytical chemistry, educational demonstrations, and research.
Pigments & Ceramics: Used in the preparation of certain ceramic glazes and colored glasses.
What is W&Q's cobalt(II) chloride hexahydrate primarily used for?
A: It has two major categories of use:
Functional Indicator: Its vivid, reversible color change makes it the key component in humidity indicator cards, self-indicating desiccants (silica gel), and educational demos.
Industrial Chemical: It is used in electroplating (for hard/functional cobalt coatings), as a catalyst/precursor in organic synthesis, and as a cobalt source in animal feed (in regulated regions) and laboratory reagents.
Why does it change color from pink to blue?
A: The color change is due to a reversible hydration/dehydration reaction. The pink/red color comes from the octahedral complex [Co(H₂O)₆]⊃2;⁺ in the hydrated form (CoCl₂·6H₂O). When heated or exposed to dry conditions, it loses water molecules to form the tetrahedral complex [CoCl₄]⊃2;⁻ in anhydrous CoCl₂, which is an intense blue. This makes it an excellent visual moisture indicator.
Can it be used in animal feed?
A: It can be used as a cobalt supplement in some regions under strict regulations, but cobalt sulfate is more widely approved (e.g., by AAFCO, EU) for feed due to its stability and established safety profile. Always check local regulations and use only designated "feed-grade" products.
W&Q stand out as a leading supplier of Cobalt chloride, backed by our expertise in fine chemicals and customer focus:
• We offer a full product line of cobalt, nickel, copper, fluoride, tungsten, and rare earth compounds—so you can source all your industrial chemicals from a single, reliable supplier.
• Our team includes professional technical personnel who provide tailored support, from helping you optimize rubber formulations to troubleshooting application issues.
• We adhere to the business philosophy of “breaking old rules and embracing innovation,” constantly improving our production processes to enhance product quality and reduce costs.
• We provide excellent after-sales service, ensuring you are satisfied with your order—if you have questions or concerns, our team responds promptly.
• With over 40 key products covering industry, agriculture, pharmacy, and feed sectors, we understand the unique needs of rubber manufacturers and can adapt to your specific requirements.
