COBALT(II) CYANIDE
- CAS NO.：20427-11-6
- Empirical Formula: C2H2CoN2O
- Molecular Weight: 128.98
- MDL number: MFCD01076547
- EINECS: 626-335-8
- SAFETY DATA SHEET (SDS)
- Update Date: 2023-10-17 17:11:54
What is COBALT(II) CYANIDE?
Chemical properties
pink to reddish brown powder(s) or needles [MER06]
Structure and conformation
A light brown precipitate of Co(CN)2.2 or 2·5H2O can be obtained from cobalt(II) chloride and potassium cyanide solutions. This can be dehydrated at 250°in a stream of nitrogen to the blue anhydrous cyanide. Both the hydrated and the anhydrous compounds have magnetic moments (3.27 and 312 B.M. respectively) which are much lower than is expected for three unpaired electrons. The crystal structures of these compounds have been interpreted as being that of soluble Prussian blue with one cobalt atom being low spin (one unpaired electron) surrounded by six carbon atoms while the other is high spin (three unpaired electrons) being surrounded by six nitrogen atoms as nearest neighbours.
Properties of COBALT(II) CYANIDE
| Melting point: | decomposes at 300℃ [CRC10] |
| Density | anhydrous: 1.872 [KIR79] |
| solubility | insoluble in H2O, acid solutions |
| form | pink-brown needles |
| color | pink-brown needles |
| Water Solubility | insoluble H2O, acids, methyl acetate; soluble alkali cyanides [MER06] |
Safety information for COBALT(II) CYANIDE
| Signal word | Danger |
| Pictogram(s) |
 Skull and Crossbones Acute Toxicity GHS06  Environment GHS09 |
| GHS Hazard Statements |
H300:Acute toxicity,oral H310:Acute toxicity,dermal H330:Acute toxicity,inhalation H410:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P260:Do not breathe dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P284:Wear respiratory protection. P301+P310:IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. |
Computed Descriptors for COBALT(II) CYANIDE
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