Cobalt chloride hexahydrate
CAS 7791-13-1
EC 616-574-6
Formula Cl2Co.6H2O
MW 237.93 g/mol
Catalysts & Catalyst Precursors Mining & MetalsPrinting & PackagingTextile, Leather & PaperCoatings, Adhesives, Sealants & ElastomersPersonal Care & CosmeticsPharmaceuticals & HealthcareAgriculture & FeedWater Treatment Preservation & BiocideCatalysisSurface Modification & Wetting
Description
Cobalt chloride hexahydrate (CAS 7791-13-1, EC 616-574-6, formula Cl2Co·6H2O) is an inorganic cobalt salt commercially known as cobaltous chloride or cobalt(II) chloride hexahydrate. It is registered under REACH and carries no E-code designation. No standard abbreviation is in common trade use.
In textile dyeing, cobalt chloride acts as a mordant, coordinating with dye molecules to fix colour onto fibre substrates through metal-ligand bonding. In catalysis, it promotes oxidation and hydroformylation reactions by providing a redox-active cobalt centre. It also functions as a humidity indicator in desiccant systems, shifting from blue to pink as water coordinates to the cobalt ion.
Cobalt chloride hexahydrate is supplied in technical and reagent grades as a crystalline solid, with packaging typically available in 25 kg bags or drums. It is subject to REACH regulation (Regulation EC 1907/2006) and classified as a substance of very high concern (SVHC) due to reproductive toxicity; buyers should confirm authorisation requirements before procurement.
In textile dyeing, cobalt chloride acts as a mordant, coordinating with dye molecules to fix colour onto fibre substrates through metal-ligand bonding. In catalysis, it promotes oxidation and hydroformylation reactions by providing a redox-active cobalt centre. It also functions as a humidity indicator in desiccant systems, shifting from blue to pink as water coordinates to the cobalt ion.
Cobalt chloride hexahydrate is supplied in technical and reagent grades as a crystalline solid, with packaging typically available in 25 kg bags or drums. It is subject to REACH regulation (Regulation EC 1907/2006) and classified as a substance of very high concern (SVHC) due to reproductive toxicity; buyers should confirm authorisation requirements before procurement.
Physical Properties
| Melting Point | 86 °C |
| Boiling Point | 1049 °C |
| Density | 3.35 |
| Appearance | Blue crystalline powder |
| Color | Red-purple |
| Odor | at 100.00?%. odorless |
| Form | Solid |
| Water Solubility | Soluble in water, ether, acetone and alcohol. |
| Vapor Pressure | 40 mm Hg ( 0 °C) |
| pH | 4.9 (50g/l, H2O, 25℃) |
| Log P | -1.380 (est) |
Safety & Handling (Learn More)
Danger GHS05 GHS07 GHS08 GHS09
H
H302H317H318H332H334H341H350H360H372H400H410H302+H332
P
P203P233P260P261P264P270P271P272P273P280P284P317P318P319P321P330P391P403P405P501P264+P265P301+P317P302+P352P304+P340P333+P317P342+P316P362+P364P305+P354+P338
Trade & Regulatory
| HS Code | 28273400 |
| UN Number | 3260 |
| ADR Class | 8 |
| Packing Group | II |
| Storage Class | 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
| WGK (Germany) | 2 |
Other Names
cobalt chloride hydrateCobaltous Chloride HexahydrateCOBALT CHLORIDECOBALTOUS CHLORIDECOBALT(II) CHLORIDECOBALT CHLORIDE PURPUREOCOBALT CHLORIDE, 6-HYDRATECOBALT CHLORIDE, HEXAHYDRATECOBALT(II) CHLORIDE-6-HYDRATE
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