Tariff reference › Chapter 29 › 2921.59.20.00
HTS 2921.59.20.00 — 4,4'-Diamino-2,2'-stilbenedisulfonic acid
The current US import duty for 4,4'-Diamino-2,2'-stilbenedisulfonic acid (HTS 2921.59.20.00) — the base rate, any Section 301/232/122 surcharge that applies, and what's changed recently.
Amine-function compounds › Aromatic polyamines and their derivatives; salts thereof: › Other: › 4,4'-Diamino-2,2'-stilbenedisulfonic acid
Current US duty rate
| Column 1 (General / MFN) | 6.5% |
|---|---|
| Special (FTA programs) | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) |
| Column 2 (other) | 15.4¢/kg + 80% |
No Chapter 99 (Section 301/232/122) cross-reference on this line; origin-specific surcharges may still apply — check the calculator.
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Programmatic access: the full duty stack (base + surcharges + MPF/HMF for a given origin & value) is at /duty?code=2921.59.20.00&origin=&value=. Current as of USITC 2026HTSRev13 (synced 2026-07-29).