Overview
Cobalt acetate (CAS 71-48-7 ), also sold as cobaltous diacetate, is an organometallic cobalt salt used primarily as a catalyst and metal source across chemical manufacturing and surface treatment industries.
It delivers reactive cobalt in a soluble, processable form that integrates readily into industrial formulations and process baths. In polymer and plastics manufacturing, it functions as a catalyst or co-catalyst.
It is used in PET polymerization and oxidation reactions, influencing color and molecular weight outcomes. Textile and leather processors use it in dyeing and finishing baths to promote dye fixation and surface uniformity.
In coatings and printing inks, it acts as a drier catalyst, accelerating oxidative cure in alkyd-based systems. Pharmaceutical and biotechnology applications draw on it as a cobalt precursor in synthesis processes.
It also serves as a trace metal supplement in fermentation media. The product is available as a pink to violet crystalline powder and in solution form, with the tetrahydrate being the most prevalent grade.
Technical and reagent-grade specifications are standard across the market. Bulk supply is typically offered in fiber drums or intermediate bulk containers, with smaller packaging available for laboratory use.
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Physical Properties
| Melting Point | 298 °C (dec.)(lit.) |
| Density | 1.13 g/cm³ |
| Appearance | Violet Crystalline Powder |
| Color | Pale pink to purple |
| Form | Powder |
| Water Solubility | Soluble in water, alcohol, dilute acids and pentyl acetate(tetrahydrate). |
| Log P | -0.285 (est) |
Safety & Handling
Danger GHS08 GHS09 GHS07 Hazard Statements H302 Harmful if swallowed H317 May cause an allergic skin reaction 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 H371 May cause 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 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. 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+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. 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.
Trade & Regulatory
| UN Number | 3077 |
| ADR Class | 9 |
| Packing Group | III |
| Storage Class | 6.1D - Non-combustible acute toxic Cat.3 toxic hazardous materials or hazardous materials causing chronic effects |
| WGK (Germany) | 2 |
Other Names
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Chemical Properties
- CAS Number
- 71-48-7
- EC Number
- 200-755-8
- Mol. Weight
- 177.02
- Category
- Organometallic Compounds