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HSChapter 32
U.S. imports of acid dyes, mordant dyes & preparations (HS 320412) totaled $5.7M in July 2026, traded with 24 countries.
Importers of Acid Dyes, Mordant Dyes & Preparations paid $918K in duties in July 2026 — an effective duty rate of 16% on $5.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Acid Dyes, Mordant Dyes & Preparations imports of $5.7M in July 2026 ran 24% above the year-to-date monthly average of $4.6M.
Last updated: July 2026 dataAcid dyes are anionic synthetic colorants applied to protein fibers (wool, silk, nylon) and leather from acidic dye baths, while mordant dyes require a metallic mordant to fix color — both are grouped here along with their preparations. The US schedule for heading 320412 is unusually granular, with named lines for specific commercial dyes including FD&C Red 40 (3204125010), FD&C Yellow 5 (3204125020), and FD&C Yellow 6 (3204125030) — FDA-certified food colorants that also classify here when imported in dye form. India leads US imports, followed by Malaysia and Mexico. FD&C-designated lines carry FDA color additive certification requirements when intended for food, drug, or cosmetic use, adding a regulatory layer beyond standard customs clearance.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
232 shipments/mo
FD&C Red 40, Yellow 5, and Yellow 6 are chemically acid dyes — their classification in heading 3204.12 is based on chemical structure and dye class, not end use. When these substances are imported for food, drug, or cosmetic applications, they are additionally subject to FDA batch certification requirements. The HTS classification does not change based on intended use, but the regulatory compliance pathway differs significantly depending on the downstream application.
FD&C color additives must be batch-certified by FDA before use in food, drugs, or cosmetics in the US. Importers should ensure that shipments are accompanied by documentation supporting FDA certification eligibility and should be prepared for FDA examination at the port of entry. Admissibility for food-use colorants is complex — consult a licensed customs broker and FDA regulatory counsel to confirm the required pre-import steps.
Subheading 2 of 11 in heading 3204
Subheading 320412 · $5.7M of $62.2M
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3204125090 | Acid Dyes, NESOI | $2.2M | 16.59% | 99.26% | $367K |
| 3204125020 | Fd&c Yellow 5 (Cas No 1934-21-0) Acid Dyes & Preps | $1.6M | 16.50% | 100.00% | $263K |
| 3204122000 | Acid Dyes & Preps,Based Thereon, Acid Black 61,Etc | $861K | 14.72% | 95.90% | $127K |
| 3204125010 | Fd&c Red 40 (Cas No. 25956-17-6) Acid Dyes & Preps | $350K | 16.50% | 100.00% | $58K |
| 3204124500 | Acid Dyes & Preps Describ in Add U.s.note 3, Sect | $229K | 16.02% | 95.24% | $37K |
| 3204125030 | Fd&c Yellow 6 (Cas No 2783-94-0) Acid Dyes & Preps | $188K | 16.50% | 100.00% | $31K |
| 3204121300 | Acid Violet 19 | $119K | 10.00% | 100.00% | $12K |
| 3204121700 | Acid Dyes & Preps Based Thereon,Acid Black 31,Etc | $101K | 15.00% | 100.00% | $15K |
| 3204123000 | Mordant Black 75,Etc | $35K | 25.06% | 100.00% | $9K |
| 3204120500 | Acid Black 210 Powder and Presscake | $7K | 0.00% | 0.00% | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3204120000 | Acid Dyes & Preps, Mordant Dyes & Preps | $3.4M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$5.7MYoY · Pro
Exports
$3.4MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
India and Switzerland together supply 85% of it.
customs district
destination
entry
rate provision · imports
0.6% enters free of duty; the effective duty rate is 16.11%.