U.S. exports of Diphenylamine and Its Derivatives; Salts (HS 292144) totaled $4.8M in August 2026.
Importers of Diphenylamine and Its Derivatives; Salts paid $157K in duties in August 2026, an average duty rate of 16.57% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataDiphenylamine (DPA) and its derivatives serve as antioxidants and stabilizers in rubber, lubricants, and propellants, with alkylated diphenylamine variants — such as the 4,4'-bis(dimethylbenzyl) compound enumerated in line 2921440500 — widely used as high-temperature antioxidants in industrial lubricants and turbine oils. Canada is the leading supplier to the US market. The US schedule separates a specifically named derivative (2921440500) from the broader category of diphenylamine and derivatives not covered by US Note 3 to Section VI (2921447000), making the note's scope a key classification reference.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
17 import shipments a month
US Note 3 to Section VI identifies certain aromatic or modified aromatic compounds that are classified elsewhere in the schedule despite their chemical structure. Products falling within that note's scope are excluded from 2921447000 and must be classified under the note-directed heading. Importers should review the note text and, if needed, seek a CBP ruling to confirm whether a specific diphenylamine derivative is captured by or excluded from the note.
Alkylated diphenylamines are consumed primarily by lubricant additive blenders serving the automotive, aviation, and industrial machinery sectors. Demand is relatively steady year-round but can spike with new lubricant formulation launches or when petroleum-based antioxidant alternatives face supply disruptions.
Subheading 4 of 18 in heading 2921
Subheading 292144 · $4.8M of $96.8M
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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 |
|---|---|---|---|---|---|
| 2921447000 | Diphenylamine and Der (Exc Prod in US Nt 3 Sec6) | $611K | 20.95% | 100.00% | $128K |
| 2921440500 | 4,4' (A, A-Dimethylbenzyl)-Diphenylamine; Etc. | $325K | 8.32% | 31.50% | $27K |
| 2921441000 | Nitrodiphenylamine | $10K | 16.50% | 100.00% | $2K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2921440000 | Diphenylamine and Its Derivatives; Salts Thereof | $4.8M |
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
$944KYoY · free account
Exports
$4.8MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $10.0M of Diphenylamine and Its Derivatives; Salts and exported $48.0M.
Through August 2026. Source: U.S. Census Bureau.
Exports · August 2026
destination
Canada and India together take 77% of it.
customs district
origin
entry
rate provision · imports
23.6% enters free of duty; duty collected equals 16.57% of imports for consumption.