Dihydrated Cobalt Chloride: Industrial Grade CoCl2·2H2O Supply
Technical Specifications and Purity Grades of Dihydrated Cobalt Chloride (CAS 16544-92-6)
Dihydrated cobalt chloride, systematically named cobalt(II) chloride dihydrate and often referred to as cobaltous chloride dihydrate, is a versatile inorganic compound with the formula CoCl2·2H2O. As a global manufacturer, NINGBO INNO PHARMCHEM CO.,LTD. supplies this light blue powder in both technical grade and reagent grade to meet diverse industrial requirements. The compound is highly water soluble, forming pink to red solutions depending on concentration and temperature, a property exploited in humidity indicators and various synthesis routes. Our standard product typically assays at 98% minimum purity, with key impurities including nickel, iron, and copper controlled to ppm levels. The exact specifications are detailed in the batch-specific COA, but a typical profile is shown below.
| Parameter | Technical Grade | Reagent Grade |
|---|---|---|
| Assay (CoCl2·2H2O) | ≥ 98.0% | ≥ 99.0% |
| Water Insoluble Matter | ≤ 0.03% | ≤ 0.01% |
| Iron (Fe) | ≤ 0.005% | ≤ 0.001% |
| Nickel (Ni) | ≤ 0.05% | ≤ 0.01% |
| Copper (Cu) | ≤ 0.005% | ≤ 0.002% |
| pH (5% solution) | 4.0 - 6.0 | 4.5 - 5.5 |
These grades serve as a drop-in replacement for equivalent products from major chemical suppliers, offering identical performance in electroplating baths, ceramic pigments, and chemical synthesis while optimizing your bulk price and supply chain reliability.
Critical COA Parameters and Batch-Specific Analytical Data for Industrial Applications
When procuring dihydrated cobalt chloride for industrial use, the Certificate of Analysis (COA) is the definitive document. Beyond the standard assay, our COA includes trace metals by ICP-OES, ensuring compliance with stringent electroplating and catalyst requirements. For instance, in electroplating bath maintenance, dihydrated cobalt chloride conductivity control is directly influenced by the presence of divalent impurities like calcium and magnesium, which can alter deposit morphology. Our manufacturing process employs controlled crystallization and washing steps to minimize these contaminants. Each batch is also tested for water content via Karl Fischer titration, as the hydration state is critical for stoichiometric calculations in synthesis routes. Please refer to the batch-specific COA for exact numerical specifications, as values may vary slightly within the guaranteed range.
Bulk Packaging, Handling, and Storage Protocols for Dihydrated Cobalt Chloride
Dihydrated cobalt chloride is hygroscopic and must be stored in tightly sealed containers to prevent moisture absorption, which can lead to caking and altered dissolution rates. Our standard packaging includes 25 kg net weight fiber drums with inner PE liners, 210L drums for larger quantities, and 1000L IBC totes for bulk shipments. All packaging is UN-approved for solid hazardous materials. For logistics, we emphasize physical integrity: desiccants are not routinely added, but we recommend climate-controlled storage below 30°C and <60% relative humidity. In ceramic glaze logistics, dihydrated cobalt chloride hygroscopic handling is critical to maintain consistent color development; we advise customers to minimize exposure time during material transfer. The product is classified as hazardous for transportation (UN 3077, Environmentally hazardous substance, solid, n.o.s., 9, III) and requires appropriate labeling and documentation.
Non-Standard Parameters and Field-Observed Behavior in Industrial Processes
Beyond the typical specifications, field experience reveals several non-standard parameters that can impact process efficiency. One notable behavior is the viscosity shift of concentrated aqueous solutions at sub-zero temperatures. While CoCl2·2H2O solutions are generally low-viscosity, at concentrations above 30% w/w and temperatures approaching -5°C, we have observed a non-linear increase in viscosity, likely due to the formation of higher chloro-complexes. This can affect pumping and metering in continuous processes. Another edge case involves trace organic impurities from certain synthesis routes that may impart a slight pinkish hue to the otherwise light blue powder; this does not affect assay but can be a concern for color-sensitive applications like humidity indicator cards. We recommend customers specify their visual color requirements if critical. Additionally, the compound exhibits a sharp deliquescence point at approximately 87% relative humidity at 25°C; above this threshold, the powder rapidly absorbs moisture and may form a saturated solution, complicating handling. Our technical team can provide guidance on mitigating these effects in your specific process environment.
Frequently Asked Questions
What is the minimum order quantity (MOQ) for dihydrated cobalt chloride?
Our standard MOQ is 100 kg for technical grade and 25 kg for reagent grade. However, we can accommodate smaller trial orders for new customers; please inquire with our sales team for sample availability and lead times.
What are your commercial terms and payment conditions?
We typically operate on EXW, FOB, or CIF terms, with payment via T/T or L/C at sight. For established customers, we offer net 30-day terms upon credit approval. Bulk pricing is volume-dependent and quoted on request.
Can you provide a Certificate of Analysis (COA) and Safety Data Sheet (SDS)?
Yes, a batch-specific COA and SDS are provided with every shipment. These documents are also available upon request prior to order placement to ensure the material meets your specifications.
Is your dihydrated cobalt chloride suitable for use in electroplating baths?
Absolutely. Our technical grade product is widely used as a cobalt source in alloy electroplating. The controlled impurity profile, particularly low iron and copper, ensures bright, ductile deposits. Refer to our technical article on electroplating bath maintenance for conductivity control tips.
How should I store dihydrated cobalt chloride to prevent degradation?
Store in a cool, dry, well-ventilated area in the original sealed packaging. Avoid exposure to moisture and direct sunlight. Once opened, reseal tightly and use promptly. For long-term storage, we recommend a desiccated environment.
Sourcing and Technical Support
As a dedicated manufacturer of cobalt salts, NINGBO INNO PHARMCHEM CO.,LTD. offers consistent quality and reliable supply of dihydrated cobalt chloride for industrial applications. Our technical team is available to discuss your specific requirements, from custom packaging to process optimization. To request a batch-specific COA, SDS, or secure a bulk pricing quote, please contact our technical sales team.