Section VI · Organic chemicals
2921.22
Hexamethylenediamine and its salts:
Chapter
Organic chemicals
Heading
The product family within the chapter
Subheading
The specific good, identical worldwide
The first six digits are the same in every country that uses the Harmonized System. The United States adds two more for the tariff rate and, often, two more for statistics — which is why the rates below are listed against 8- and 10-digit numbers rather than against this code.
How the schedule reaches this code
- 29Organic chemicals
- 2921Amine-function compounds
- Acyclic polyamines and their derivatives; salts thereof:
- Hexamethylenediamine and its salts:
Published US duty rates
Duty is set at the 8- or 10-digit line, not at this 6-digit subheading, so more than one rate can sit under this code.
- 2921.22.05.00Hexamethylenediamine adipate (Nylon salt)kg
- General
- 6.5%
- Special (FTA)
- Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
- Column 2
- 15.4¢/kg + 46%
Only if the goods qualify under one of these programs.
Countries without normal trade relations.
- 2921.22.10.00Derived in whole or in part from adipic acidkg
- General
- 6.5%
- Special (FTA)
- Free (A+,AU,BH,CL,CO,D, E,IL,JO, KR,MA,OM,P, PA,PE,S,SG)
- Column 2
- 15.4¢/kg + 66.5%
Only if the goods qualify under one of these programs.
Countries without normal trade relations.
- 2921.22.50.00Otherkg
- General
- 6.5%
- Special (FTA)
- Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
- Column 2
- 30.5%
Only if the goods qualify under one of these programs.
Countries without normal trade relations.
Schedule footnotes
- See 9903.88.03.
A reference to Chapter 99 means an additional action — a Section 232 or 301 measure, an exclusion, or a quota — applies on top of the rate above.
This is the listed rate. Antidumping and countervailing duty orders, Chapter 99 actions and preference qualification all change what is actually collected, and classification is a judgement about your goods. Verify with your licensed customs broker before you file.
Other subheadings in heading 2921
- 2921.11Methylamine, di- or trimethylamine and their salts
- 2921.122-(N,N-Dimethylamino)ethyl chloride hydrochloride
- 2921.132-(N,N-Diethylamino)ethyl chloride hydrochloride
- 2921.142-(N,N,-Diisopropylamino)ethyl chloride hydrochloride
- 2921.19Other:
- 2921.21Ethylenediamine and its salts
- 2921.29Other
- 2921.30Cyclanic, cyclenic or cycloterpenic mono- or polyamines, and their derivatives; salts thereof:
- 2921.41Aniline and its salts:
- 2921.42Aniline derivatives and their salts:
- 2921.43Toluidines and their derivatives; salts thereof:
- 2921.44Diphenylamine and its derivatives; salts thereof:
- 2921.451-Naphthylamine (α-Naphthylamine), 2-Naphthylamine (β-Naphthylamine), and their derivatives; salts thereof:
- 2921.46Amfetamine (INN), benzfetamine (INN), dexamfetamine (INN), etilamfetamine (INN), fencamfamin (INN), lefetamine (INN), levamfetamine (INN), mefenorex (INN) and phentermine (INN); salts thereof
- 2921.49Other:
- 2921.51o-, m-, p-Phenylenediamine, diaminotoluenes, and their derivatives; salts thereof:
- 2921.59Other:
Source: U.S. International Trade Commission (USITC) — 2026 HTS Revision 12, released 2026-07-21, published at hts.usitc.gov. A U.S. Government work in the public domain.