Acid Black 31 Dye from Japan

Acid Black 31 is a synthetic organic acid dye used primarily for dyeing wool, silk, and nylon fabrics. It falls under HTS 3204.12.17.00 as it is one of the specifically enumerated acid black dyes in this subheading. This water-soluble dye provides deep black shades with good fastness properties on protein and synthetic fibers.

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%

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Import Tips

• Verify the exact Colour Index name and concentration through lab analysis to confirm classification under this specific subheading

• Provide supplier's Certificate of Analysis (CoA) showing it's Acid Black 31 to avoid misclassification as a general acid dye

• Ensure packaging labels comply with TSCA requirements for chemical dyes imported into the US