Description
Chemical Name: Copper naphthenate
Synonyms: Copper (II) Naphthenate, Copper Naphthenic Acid Salt, Naphthenic Acid Copper Salt, Copper Naphtenate, Copper Naphthenate Solution
Molecular Structure:

Specifications:
Items | Specifications |
Cas No. | 1338-02-9 |
Molecular Formula | 2(C11H7O2).Cu |
Molecular Weight | 405.89 |
Appearance | Dark green transparent liquid |
Purity | ≥8% or 5% |
Oil Soluble | Completely dissolved |
Stability of The Solution | Even without precipitation |
What is Copper Naphthenate?
This product is a copper-based wood preservative and corrosion inhibitor. Copper Naphthenate works by protecting wood against termites, fungi, and other pests while offering a protective layer for metals to resist rust. With around 8% copper content, it’s a reliable solution for both preventing decay and adding a natural greenish tint to treated surfaces.
The main uses of Copper Naphthenate CAS 1338-02-9?
Copper Naphthenate is used by professionals across different industries, especially those involved in wood preservation, construction, and metal protection. It’s the go-to solution for anyone who needs to extend the life of wood structures or metal components—think utility companies treating wooden poles or marine contractors protecting docks and piers.
You’ll want to use Copper Naphthenate when dealing with projects that expose wood or metal to outdoor elements. Whether you’re constructing a new fence, treating a utility pole, or reinforcing marine pilings, it’s best applied during the construction or maintenance phase to ensure long-term protection. It’s especially valuable in environments where moisture or pests are a constant threat.
Why should you use the Copper Naphthenate?
Copper Naphthenate is highly effective because it offers a powerful defense against both biological and environmental damage. It protects wood from rotting and metal from rusting, ensuring your materials last longer and stay in better condition. Plus, it’s a greener, less toxic alternative to older treatments like creosote, so it’s better for both your project and the environment.
How is the Copper Naphthenate Applied?
Applying Copper Naphthenate is straightforward. It can be brushed on, sprayed, or even dipped, depending on the material and size of the job. For wood, it penetrates deeply, creating a strong barrier against pests and decay. For metal, it forms a protective coating to ward off corrosion. Just make sure to allow enough time for it to dry and fully cure before putting the material into use.







