cobalt(ii) iodide, ultra dry
Cobalt(II) Iodide, Anhydrous
CAS: 15238-00-3
Molecular Formula: CoI2
cobalt(ii) iodide, ultra dry - Names and Identifiers
cobalt(ii) iodide, ultra dry - Physico-chemical Properties
| Molecular Formula | CoI2 |
| Molar Mass | 312.74 |
| Density | 5.45 g/mL at 25 °C(lit.) |
| Melting Point | >515 °C(lit.) |
| Boling Point | 570°C |
| Flash Point | 570°C vac. |
| Water Solubility | Soluble in water. |
| Solubility | acetone: slightly soluble(lit.) |
| Appearance | powder |
| Specific Gravity | 5.68 |
| Color | White |
| Exposure Limit | ACGIH: TWA 0.02 mg/m3 |
| Merck | 14,2443 |
| Storage Condition | 2-8℃ |
| Stability | hygroscopic |
| Sensitive | Hygroscopic |
| MDL | MFCD00016030 |
| Use | Uses Used as general reagents and catalysts. |
cobalt(ii) iodide, ultra dry - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| TSCA | Yes |
cobalt(ii) iodide, ultra dry - Nature
| EPA chemical information | Cobalt iodide (CoI2) (15238-00-3) |
Last Update：2024-04-10 22:29:15
cobalt(ii) iodide, ultra dry - Production method
α CoI 2 is obtained by heating cobalt powder in a hydrogen iodide stream to 400~500 ℃. ββCoI 2 is obtained by sublimation of αCoI 2 in high vacuum.
The metal cobalt powder prepared from cobalt oxalate is heated in a hydrogen iodide stream at a temperature of 400 to 500°C for 4 to 5h. The resulting cobalt iodide is heated and melted at 550°C and then cooled in a vacuum to obtain α-CoI2.
The resulting α-CoI2 is vacuum sublimated to obtain β-CoI. As shown in the figure, when vacuum sublimation is carried out at 570~575 ℃, 6 places are residual metal cobalt, 5 places are attached α-CoI2, and 4 places are simultaneously attached with the target product β-CoI and part of iodine. The tube is then kept horizontal and the part from 6 to 3 is placed on the furnace and heated to 100°C. In addition, the other parts are heated with a fan-shaped flame, so that the attached iodine is collected in 1 place, and then the target products in 4 places are concentrated in 2 places. After filling the sublimation tube with nitrogen, melt and cut the 2 places. This method can produce about 0.8g β-CoI with 10g α-CoI2.
Last Update：2024-04-10 22:29:15
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View History
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