| Melting Point | 100°C |
| Density | 2.54 g/mL |
| pH | 3.0–3.8 |
| Color | Blue-green |
| Packaging | Glass Bottle |
| Linear Formula | CuCl2 · 2H2O |
| Formula Weight | 170.48 g/mol |
| Physical Form | Solid |
| Chemical Name or Material | Cupric Chloride Dihydrate |
| UN Number | UN2802 |
| Identification | Pass Test |
| Grade | Certified |
| Total Trace Metal Impurities | Fe ≤0.015%, Sulfate ≤0.005%, Ca ≤0.005%, Insoluble matter ≤0.010%, Nitrate ≤0.015%, K ≤0.01%, Na ≤0.02%, Ni ≤0.01%, As ≤1 ppm |
| Iron (Fe) | 0.015% max. |
| Sulfate | 0.005% max. |
| Calcium (Ca) | 0.005% max. |
| Insoluble Matter | 0.010% max. |
| Nitrate | 0.015% max. |
| Potassium (K) | 0.01% max. |
| Sodium (Na) | 0.02% max. |
| Nickel (Ni) | 0.01% max. |
| Arsenic (As) | 1ppm max. |
| CAS Number | 10125-13-0 |
| EC Number | 231-210-2 |
| MDL Number | MFCD00149674 |
| PubChem CID | 61482 |
| InChIKey | MPTQRFCYZCXJFQ-UHFFFAOYSA-L |
Cupric chloride dihydrate is the hydrated form of copper(II) chloride, a blue-green ionic salt in which each copper(II) ion is coordinated with chloride ions and two water molecules of crystallization. It is highly soluble in water, giving formulators and chemists a convenient, well-characterized way to introduce copper(II) ions into a reaction or formulation without handling a less soluble oxide or carbonate form.
Cupric chloride’s role as a soluble copper(II) source underlies most of its applications: it catalyzes select organic oxidation reactions, functions as a mordant that fixes dye to textile fibers, and serves as a registered active in algaecide and fungicide formulations used in agriculture and water treatment. It also supplies trace copper in animal feed premixes, and its etching action on metal surfaces makes it useful in printed-circuit-board and specialty metal-finishing processes.
