Overview
Cobalt hydroxide (CAS 12672-51-4 ), also known as cobaltous hydroxide, is an inorganic cobalt compound used as a precursor and reactive intermediate across coatings, catalyst, and battery material supply chains.
It serves as a primary source of cobalt ion activity in systems requiring controlled reactivity or conversion to downstream cobalt compounds. In coatings and adhesives, it functions as a drier precursor and catalyst activator.
This material accelerates oxidative crosslinking in alkyd and oil-based systems. Battery and energy material manufacturers use it as a direct precursor to cobalt oxide and lithium cobalt oxide cathode materials.
In mining and hydrometallurgy, it appears as an intermediate in cobalt refining circuits, where pH adjustment drives selective precipitation from leach solutions. This process ensures high-quality output for industrial use.
Textile and paper processing operations use cobalt hydroxide for catalytic bleaching and as a pH buffer in specific wet-chemistry stages. It is supplied as a fine powder or wet cake for various applications.
Moisture content and cobalt assay are the primary specification parameters buyers evaluate. Technical grade is the standard commercial form, with purity typically expressed as minimum cobalt content by weight.
Battery-grade material is available with tighter particle size distribution and trace metal controls to meet cathode precursor specifications. These standards ensure the material performs reliably in high-tech manufacturing.
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Physical Properties
| Melting Point | 168 ° C (334.4 ° F) |
| Density | 3.60 g/cm³ (solid) (particles) |
| Color | Red or bluish-green |
| Form | powder |
| Water Solubility | 3.20 mg/L |
Safety & Handling
Danger GHS06 GHS08 Hazard Statements H302 Harmful if swallowed H317 May cause an allergic skin reaction H319 Causes serious eye irritation H330 Fatal if inhaled H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled H372 Causes damage to organs through prolonged or repeated exposure 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. P280 Wear protective gloves/protective clothing/eye protection/face protection. P284 In case of inadequate ventilation wear respiratory protection. P316 Get emergency medical help immediately. P318 IF exposed or concerned, get medical advice. P319 Get medical advice/attention if you feel unwell. P320 Specific treatment is urgent (see … on this label). P321 Specific treatment (see … on this label). P330 Rinse mouth. 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+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. 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.
Other Names
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Chemical Properties
- CAS Number
- 12672-51-4
- EC Number
- 235-763-0
- Mol. Weight
- 92.948
- Category
- Pigments & Colorants