Tandom · Duty calculator
HTS 2921.59.20.00 is the U.S. Harmonized Tariff Schedule classification for Amine-function compounds, 4,4'-Diamino-2,2'-stilbenedisulfonic acid. It's a 10-digit statistical line in Chapter 29: Organic chemicals, Section VI: Products of the Chemical or Allied Industries, used by U.S. Customs and Border Protection to determine the duty rate at entry. 1 active AD/CVD order flags this code.
New to HTS codes? Read our guide on how HTS classification works →
Active orders that may apply to imports under this HTS code. HTS coverage is advisory — actual scope depends on each order's product description. Run the AD/CVD lookup → to check whether your specific shipment is in scope.
Past CBP decisions classifying real products under this HTS code. Useful precedent when classifying a similar product — each ruling shows how CBP interpreted the code for a specific case.
The tariff classification of Diaminostilbenedisulfonic acid (DSD acid) from India
Source: CBP CROSS (view all rulings on rulings.cbp.gov →)
HTS 2921.59.20.00 is the U.S. Harmonized Tariff Schedule classification for Amine-function compounds, 4,4'-Diamino-2,2'-stilbenedisulfonic acid. It belongs to Chapter 29 of the HTSUS.
The general (Column 1) duty rate for HTS 2921.59.20.00 is 6.5%. This is the most-favored-nation (MFN) rate that applies to imports from World Trade Organization member countries.
Yes. Imports of HTS 2921.59.20.00 from countries party to a trade program (such as USMCA, KORUS, GSP, or the African Growth and Opportunity Act) may qualify for the special rate: Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG). Eligibility depends on rules of origin and certification.
The Column 2 rate for HTS 2921.59.20.00 is 15.4¢/kg + 80%. This rate applies to imports from countries that do not have normal trade relations with the United States (currently Cuba and North Korea).
No active Chapter 99 tariff overlays (Section 301, Section 232, IEEPA reciprocal, etc.) currently flag HTS 2921.59.20.00 in Tandom's catalog. Use the calculator's date + origin inputs to confirm against any retroactive overlay you may be filing.
Yes — 1 AD/CVD order flag this code: A-533-847 (AD, India). Open the code page for deposit rates, scope determinations, and the linked case lookups.
Free Trade Agreement and special-program eligibility
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