Loading...
HSChapter 29
U.S. imports of hexamethylenediamine and its salts (HS 292122) totaled $210K in April 2026, traded with 5 countries.
Importers of Hexamethylenediamine and Its Salts paid $31K in duties in April 2026 — an effective duty rate of 19% on $160K in dutiable value, based on actual customs collections rather than the published tariff schedule. Hexamethylenediamine and Its Salts imports of $210K in April 2026 ran 35% above the year-to-date monthly average of $156K.
Last updated: April 2026 dataHexamethylenediamine (HMD or HMDA) is the critical monomer for Nylon 6,6 production, and its salt form with adipic acid — nylon salt — is explicitly broken out in the US tariff schedule under 2921220500, reflecting its commercial importance to the synthetic fiber and engineering plastics industries. Additional lines distinguish HMD salts derived from adipic acid (2921221000) from those derived from other sources (2921225000), a distinction that matters for classification and duty purposes. Canada and France are the leading suppliers to the US market. Importers should be aware that Chinese-origin HMD may be subject to Section 301 tariff exposure, making origin documentation particularly important.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The schedule separates nylon salt (hexamethylenediamine adipate, 2921220500) from other HMD salts derived from adipic acid (2921221000) and those not derived from adipic acid (2921225000). Correct classification depends on the specific salt form and its precursor acid, so laboratory analysis or supplier documentation confirming the manufacturing route is advisable.
Imports of hexamethylenediamine from China may be subject to Section 301 tariffs. Importers should confirm the applicable tariff treatment for the specific HTS line at the time of entry, as Section 301 lists and exclusion status can change.
Supplier Network
Get discovered by U.S. importers searching for HS 292122 — Hexamethylenediamine and Its Salts. Be the first supplier listed.
Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2921225000 | HEXAMETHYLENE AND ITS SLTS, NOT FROM ADIPIC ACID | $210K | 19.30% | $31K |
| 2921220500 | HEXAMETHYLENEDIAMINE ADIPATE (NYLON SALT) | $0 | -- | -- |
| 2921221000 | HEXAMETHYLENEDIAMINE AND SLTS, DER FRO ADIPIC ACID | $0 | -- | -- |
HEXAMETHYLENE AND ITS SLTS, NOT FROM ADIPIC ACID
HEXAMETHYLENEDIAMINE ADIPATE (NYLON SALT)
HEXAMETHYLENEDIAMINE AND SLTS, DER FRO ADIPIC ACID
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2921220000 | HEXAMETHYLENEDIAMINE AND ITS SALTS | $16.8M |
HEXAMETHYLENEDIAMINE AND ITS SALTS
7.4M kg
NUCLEIC ACIDS & SALTS; OTHER HETEROCYCLIC CMP, NES
HS 293499
HETEROCYCLIC COMP W NITROGEN HETERO-ATM ONLY NESOI
HS 293399
POLYPEPTIDE PROTEIN& GLYCOPROTEIN HORMONES &DERIV
HS 293719
CMPDS CONT AN UNFUSED PYRIDINE RING ETC NESOI
HS 293339
COMP WITH PYRIMIDINE OR PIPERAZINE RING, NESOI
HS 293359
ANTIBIOTICS, NESOI
HS 294190
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | -- | $5.6M | +$5.6M |
| PORT HURON, MI | -- | $4.0M | +$4.0M |
| SAVANNAH, GA | -- | $3.5M | +$3.5M |