Acid Black 31 Dye
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If dispersed in nonaqueous media for paint manufacturing
Preparations of acid dyes dispersed in nonaqueous media fall under 3204.12.20 rather than the pure dye form.
If other acid dyes not specifically enumerated
Only specifically listed dyes like Acid Black 31 are in 3204.12.17; other acid dyes go to 3204.19.
If put up in retail packaging under 4kg
Dyes packaged for retail sale (not bulk industrial) are classified in heading 3212 regardless of type.
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Import Tips & Compliance
• 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
Related Products under HTS 3204.12.17.00
Acid Blue 127 Dye
Acid Blue 127 is a metallized acid dye specified in HTS 3204.12.17.00, used for brilliant blue shades on wool, silk, and polyamide textiles. Its premetallized structure provides excellent light and wet fastness. Commonly used in carpet dyeing and high-end apparel.
Acid Red 145 Dye
Acid Red 145, listed under HTS 3204.12.17.00, is a scarlet acid dye for wool and silk with excellent brightness and fastness. Used in decorative textiles and leather dyeing. Its chemical structure provides vibrant red shades stable to washing and light exposure.
Mordant Black 8 Dye
Mordant Black 8, specifically named in HTS 3204.12.17.00, requires metal mordants (chromium, aluminum) for fixation on wool and leather. Provides jet black shades with superior fastness. Traditional use in worsted wool suiting and upholstery fabrics.
Acid Yellow 75 Dye
Acid Yellow 75 (HTS 3204.12.17.00) is a bright greenish-yellow acid dye for wool, silk and modified acrylics. Excellent leveling properties and light fastness. Used in blend dyeing for khaki military uniforms and sportswear.
Acid Brown 48 Dye
Acid Brown 48, enumerated in HTS 3204.12.17.00, produces chocolate brown shades on wool with mordants. Used in leather upholstery and heavy woolens. Known for excellent penetration and even dyeing.
Acid Green 40 Dye
Acid Green 40 (HTS 3204.12.17.00) provides brilliant emerald green on wool and silk. Specifically listed acid dye with good acid and alkali fastness. Used in fine gauge knits and decorative fabrics.