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SITCSection 5
U.S. imports of acid and mordant dyes and preparations (SITC 53112) totaled $5.7M in July 2026, traded with 24 countries.
Importers of Acid and Mordant Dyes and 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 and Mordant Dyes and 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 bond ionically to protein and polyamide fibers — wool, silk, and nylon — making them a critical input for the specialty textile, carpet, and leather dyeing industries. Mordant dyes in this grouping require a metallic salt fixative to achieve wash-fastness, a processing distinction that affects both formulation and wastewater compliance at the mill level. Classification between acid and mordant subtypes matters for end-use documentation, particularly when preparations contain pre-complexed metal ions that could trigger separate chemical regulatory review.
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232 shipments/mo
Basic heading 300 of 465 in section 5
Basic heading 53112 · $5.7M of $28.9B
Acid dyes are applied directly from an acidic bath and bond to fiber without a separate fixative, while mordant dyes require a metallic mordant — typically chromium or aluminum salts — applied before or after dyeing to fix the color. This processing distinction can affect classification when a preparation contains both the dye and the mordant pre-combined, as the mixture's essential character must be assessed.
Pre-metallized acid dyes containing chromium or other heavy metals may be subject to EPA Toxic Substances Control Act (TSCA) inventory requirements. Importers should confirm that the specific chemical substance is listed on the TSCA inventory or that an applicable exemption applies before entry.
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Imports · July 2026
origin
India and Switzerland together supply 85% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$5.7MYoY · Pro
Exports
$3.4MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.