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HSChapter 28
U.S. exports of salts of oxometallic or peroxometallic acids, not elsewhere specified (HS 284190) totaled $7.8M in July 2026.
Importers of Salts of Oxometallic or Peroxometallic Acids, Not Elsewhere Specified paid $646K in duties in July 2026 — an effective duty rate of 13% on $5.1M in dutiable value, based on actual customs collections rather than the published tariff schedule. Salts of Oxometallic or Peroxometallic Acids, Not Elsewhere Specified imports of $6.1M in July 2026 ran 50% below the year-to-date monthly average of $12.3M.
Last updated: July 2026 dataA chemically diverse residual heading, this category captures vanadates, aluminates, ammonium perrhenate, chromates of zinc or lead, and other oxometallic salts that do not fit more specific provisions — each with distinct industrial roles ranging from catalyst supports to specialty pigments and rhenium recovery. The US schedule assigns separate lines to vanadates (2841901000), ammonium perrhenate (2841902000), aluminates (2841904000), chromates of zinc or lead (2841904500), and two residual lines for remaining compounds. South Korea and Canada lead US import supply for this heading.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
74 shipments/mo
Importers should present a certificate of analysis confirming the compound is ammonium perrhenate (NH4ReO4) with stated rhenium purity. Because rhenium is a critical mineral used in superalloy and catalyst applications, CBP may request additional documentation to verify the compound's identity and value. Filing under the correct line (2841902000) rather than the residual avoids post-entry classification disputes.
Chromates of zinc and lead (2841904500) contain both hexavalent chromium and, in the case of lead chromate, a heavy metal regulated under TSCA and various state environmental laws. Importers must ensure TSCA compliance and provide proper hazardous materials documentation. Products intended for use in coatings or pigments may also face state-level restrictions under regulations such as California's Proposition 65.
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2841905000 | Salt of Oxometallic/Peroxometalltc Acids, NESOI | $5.7M | 11.06% | 87.45% | $633K |
| 2841904000 | Aluminates | $189K | 6.42% | 49.87% | $12K |
| 2841902000 | Ammonium Perrhenate | $159K | 0.00% | 0.00% | -- |
| 2841904500 | Chromates of Zinc or of Lead | $8K | 13.70% | 100.00% | $1K |
| 2841901000 | Vanadates,(Vanadium Content) | $0 | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2841909000 | Salt of Oxometallic or Peroxometallic Acids NESOI | $7.0M |
| 2841904000 | Aluminates | $730K |
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
$6.1MYoY · Pro
Exports
$7.8MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Hungary and Canada together take 52% of it.
customs district
origin
entry
rate provision · imports
14.8% enters free of duty; the effective duty rate is 10.63%.