U.S. exports of Hexamethylenediamine and Its Salts (HS 292122) totaled $51.9M in August 2026.
Hexamethylenediamine and Its Salts imports of $34K in August 2026 ran 72% below the year-to-date monthly average of $121K.
Last updated: August 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.
3 import shipments a month
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.
Subheading 1 of 18 in heading 2921
Subheading 292122 · $51.9M of $96.8M
Trade Directory
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2921225000 | Hexamethylene and Its Slts, Not From Adipic Acid | $34K | 11.28% | 80.19% | $4K |
| 2921220500 | Hexamethylenediamine Adipate (Nylon Salt) | — | -- | -- | -- |
| 2921221000 | Hexamethylenediamine and Slts, Der Fro Adipic Acid | — | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2921220000 | Hexamethylenediamine and Its Salts | $51.9M |
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.
ImportsExports
Imports
$34KYoY · free account
Exports
$51.9MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $1.3M of Hexamethylenediamine and Its Salts and exported $483.4M.
Through August 2026. Source: U.S. Census Bureau.
Exports · August 2026
destination
Canada and Netherlands together take 49% of it.
customs district
origin
entry
rate provision · imports
19.8% enters free of duty; duty collected equals 11.28% of imports for consumption.