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HSChapter 28
U.S. exports of calcium phosphates (other, nesoi) (HS 283526) totaled $12.2M in July 2026.
Importers of Calcium Phosphates (Other, NESOI) paid $1.1M in duties in July 2026 — an effective duty rate of 14% on $8.4M in dutiable value, based on actual customs collections rather than the published tariff schedule. Calcium Phosphates (Other, NESOI) imports of $9.3M in July 2026 ran 29% below the year-to-date monthly average of $13.1M.
Last updated: July 2026 dataBeyond dicalcium phosphate, a range of calcium phosphate salts — including tricalcium phosphate, hydroxyapatite, and monocalcium phosphate — fall under this residual heading, each serving distinct roles in food fortification, ceramics, and biomedical applications. The Netherlands and Russia are leading US import sources, with Japan and Morocco also contributing supply. All entries are consolidated under tariff line 2835260000, making precise chemical identification on import documentation essential for downstream quality and regulatory purposes. Food and supplement applications trigger FDA admissibility review.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
121 shipments/mo
Heading 283525 is reserved exclusively for calcium hydrogenorthophosphate (dicalcium phosphate, CaHPO₄). Heading 283526 captures all other calcium phosphate salts not elsewhere specified, including tricalcium phosphate (Ca₃(PO₄)₂), monocalcium phosphate, and hydroxyapatite. Importers should verify the precise chemical formula and CAS number on their documentation to ensure correct classification and avoid potential reclassification at the border.
The Netherlands and Russia are the top US suppliers under this heading. Geopolitical developments affecting Russian exports and shifting European chemical logistics can create supply disruptions. Importers relying on a single-origin strategy may wish to qualify alternative suppliers in Japan or Morocco to manage concentration risk, particularly for specialty or high-purity grades.
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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 |
|---|---|---|---|---|---|
| 2835260000 | Other Phosphates of Calcium, NESOI | $9.3M | 12.35% | 90.84% | $1.1M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2835260000 | Other Phosphates of Calcium, NESOI | $12.2M |
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
$9.3MYoY · Pro
Exports
$12.2MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
customs district
origin
entry
rate provision · imports
9.2% enters free of duty; the effective duty rate is 12.35%.