Overview
Cobalt octoate (CAS 136-52-7 ), also sold as cobalt 2-ethylhexanoate, is an oil-soluble cobalt salt used as a metal drier and curing catalyst across coatings, adhesives, and polymer manufacturing.
It accelerates oxidative crosslinking and cure reactions, making it a go-to catalyst where controlled drying speed and through-cure performance are critical sourcing criteria for industrial manufacturers.
In alkyd and oxidative-cure coatings, this material acts as a primary drier, accelerating surface dry times in architectural paints, industrial finishes, and high-performance printing inks.
Rubber and tire compounders use it to promote adhesion between steel cord and rubber compounds during vulcanization, directly affecting bond strength in finished tire construction and safety.
In unsaturated polyester resins and gel coats, it functions as a promoter alongside peroxide initiators to control cure onset and the overall processing window during the manufacturing stage.
Adhesive and sealant formulators incorporate it as a crosslinking catalyst in systems requiring fast ambient-temperature cure without the need for additional heat input or specialized equipment.
The product is supplied as a liquid solution, with cobalt metal content typically ranging from 6% to 12% in hydrocarbon or mineral spirit carriers to ensure easy integration into formulations.
Both technical and coatings-grade specifications are available to meet different purity and color requirements. Drum, IBC, and bulk liquid supply formats are standard across the global market.
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Physical Properties
| Density | 1.013 g/cm³ @ Temp: 25 °C |
| Flash Point | 104 °F |
| Color | purple |
| Form | liquid |
| Water Solubility | 40.3g/L at 20℃ |
| Vapor Pressure | 5Pa at 25℃ |
Safety & Handling
Danger GHS02 GHS07 GHS08 GHS09 Hazard Statements H226 Flammable liquid and vapor H302 Harmful if swallowed H315 Causes skin irritation H317 May cause an allergic skin reaction H319 Causes serious eye irritation H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled 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 H372 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 H411 Toxic to aquatic life with long lasting effects H412 Harmful to aquatic life with long lasting effects Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P233 Keep container tightly closed. P240 Ground and bond container and receiving equipment. P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment. P242 Use non-sparking tools. P243 Take action to prevent static discharges. 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. 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. P370+P378 Use … for extinction. P403+P235 Store in a well-ventilated place. Keep cool. P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. 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 | 1268 |
| ADR Class | 3 |
| Packing Group | III |
| Storage Class | 3 - Flammable liquids |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 136-52-7
- EC Number
- 205-250-6
- Mol. Weight
- 345.34
- Category
- Organometallic Compounds