Copper Naphthenate Wood Preservative from Japan
Copper naphthenate is a water-insoluble salt of naphthenic acids used as a fungicide and insecticide for pressure-treated wood products like decks and fences. It falls under HTS 3824.99.75 as it is specifically a water-insoluble salt of naphthenic acids prepared for industrial preservative applications. This classification covers such metallic naphthenates not elsewhere specified in Chapter 38.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Verify the water-insolubility of the naphthenate salt through lab testing, as soluble forms may classify elsewhere
• Include Safety Data Sheets (SDS) and EPA registration if used as a pesticide to ensure compliance with FIFRA
• Avoid misclassification as paint additives by specifying end-use as industrial wood preservative