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HSChapter 38
U.S. exports of finishing agents & dye carriers with an amylaceous (starch-based) basis (HS 380910) totaled $1.1M in July 2026.
Importers of Finishing Agents & Dye Carriers with an Amylaceous (Starch-Based) Basis paid $10K in duties in July 2026 — an effective duty rate of 6.5% on $150K in dutiable value, based on actual customs collections rather than the published tariff schedule. Finishing Agents & Dye Carriers with an Amylaceous (Starch-Based) Basis imports of $150K in July 2026 ran 28% above the year-to-date monthly average of $117K.
Last updated: July 2026 dataStarch-based finishing agents and dye carriers used in textile, paper, and related processing industries are classified under a single 10-digit line, 3809100000, reflecting the relatively narrow commercial scope of this amylaceous-basis category compared to the synthetic-chemistry alternatives in 380991–380993. The United Kingdom and Austria lead US supply, with Germany also a notable source — a European concentration consistent with the specialty-chemical expertise required to produce performance-grade starch derivatives for industrial textile finishing. These products function as sizing agents, handle-modifiers, or dye-fixation aids, and their starch basis distinguishes them from the broader synthetic-polymer finishing agents classified in 380991.
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10 shipments/mo
Starch-based finishing agents are applied to yarns or fabrics to improve weaveability, add body or stiffness, reduce fiber breakage during processing, or act as a temporary size that is washed out in subsequent finishing steps. Modified starches may also serve as dye carriers or fixatives. Their natural-polymer basis makes them attractive for applications where biodegradability or compatibility with natural fibers is a priority, though they are generally less durable than synthetic alternatives.
The key criterion is whether the product has a basis of amylaceous (starch or dextrin) substances. If the starch or dextrin component is the primary functional constituent, classification in 380910 is appropriate. If the product is predominantly a synthetic polymer or surfactant system with only minor starch content, heading 380991 (or another NESOI line) is more likely correct. When the formulation is a true blend with no clear dominant basis, a CBP binding ruling based on the product's technical data sheet is the most reliable path to correct classification.
Subheading 4 of 4 in heading 3809
Subheading 380910 · $150K of $16.7M
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 |
|---|---|---|---|---|---|
| 3809100000 | Finishing Agents & Dye Carrier of Amylaceous Subst | $150K | 6.49% | 100.00% | $10K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3809100000 | Finishing Agents & Dye Carrier of Amylaceous Subst | $1.1M |
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.
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ImportsExports
Imports
$150KYoY · Pro
Exports
$1.1MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Canada and Mexico together take 58% of it.
customs district
origin
entry
rate provision · imports
the effective duty rate is 6.49%.