Overview
Cobalt chloride (CAS 7646-79-9 ), also sold as cobaltous chloride anhydrous or CoCl2, is an inorganic cobalt salt used across chemical manufacturing, agriculture, and industrial processing.
It functions primarily as a catalyst precursor, colorant, and source of bioavailable cobalt in trace mineral applications. In agriculture and animal feed, it corrects cobalt deficiencies in livestock.
The material is frequently incorporated into mineral premixes and fertilizer formulations. Textile and leather processors use it as a mordant to fix dyes and improve color fastness on treated substrates.
In catalyst manufacturing, it serves as a precursor for hydrodesulfurization and Fischer-Tropsch catalysts used in refinery and petrochemical operations. This makes it vital for energy sector applications.
The compound also functions as a humidity indicator in desiccant systems and silica gel products. Its color-change behavior drives procurement in packaging and electronics protection industries worldwide.
Cobalt chloride is supplied as an anhydrous powder or as the hexahydrate form, with the hexahydrate being the more common commercial grade. It meets high industrial quality standards.
Standard specifications include technical grade and reagent grade, with purity levels typically ranging from 97% to 99%+. Packaging is available in drums and bulk quantities for industrial use.
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Physical Properties
| Melting Point | 735 °C |
| Boiling Point | 1049 °C |
| Density | 3.36 g/cm³ @ Temp: 25 °C |
| Flash Point | 500°C |
| Appearance | (1) Blue, (2) ruby-red crystals.Soluble in water, alcohol, and acetone. |
| Color | Pale blue |
| Odor | Slight sharp odor |
| Form | beads |
| Water Solubility | soluble |
| Vapor Pressure | 40 mm Hg ( 0 °C) |
| pH | pH (50g/l, 25℃) : >=3.0 |
Safety & Handling
Danger GHS07 GHS08 GHS09 GHS05 GHS06 Hazard Statements H301 Toxic if swallowed H302 Harmful if swallowed H315 Causes skin irritation H317 May cause an allergic skin reaction H318 Causes serious eye damage H319 Causes serious eye irritation H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled H335 May cause respiratory irritation H341 Suspected of causing genetic defects H350 May cause cancer H351 Suspected of causing cancer H360 May damage fertility or the unborn child H361 Suspected of damaging fertility or the unborn child H370 Causes damage to organs H372 Causes damage to organs through prolonged or repeated exposure H373 May causes damage to organs through prolonged or repeated exposure H400 Very toxic to aquatic life H401 Toxic to aquatic life H410 Very toxic to aquatic life with long lasting effects Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P233 Keep container tightly closed. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P284 In case of inadequate ventilation wear respiratory protection. P317 Get emergency medical help. P318 IF exposed or concerned, get medical advice. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P391 Collect spillage. P403 Store in a well-ventilated place. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P316 Get emergency medical help immediately. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P308+P316 Get emergency medical help immediately. P332+P317 Get emergency medical help. P333+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P342+P316 Get emergency medical help immediately. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 28273930 |
| UN Number | 2923 |
| ADR Class | 8 |
| Packing Group | III |
| Storage Class | 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
| WGK (Germany) | 2 |
Other Names
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Chemical Properties
- CAS Number
- 7646-79-9
- EC Number
- 231-589-4
- Mol. Weight
- 129.84
- HS Code
- 28273930
- Category
- Pigments & Colorants