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HSChapter 28
U.S. imports of calcium phosphates (other, nesoi) (HS 283526) totaled $19.9M in April 2026, traded with 19 countries.
Importers of Calcium Phosphates (Other, NESOI) paid $3.8M in duties in April 2026 — an effective duty rate of 20% on $19.3M in dutiable value, based on actual customs collections rather than the published tariff schedule. Calcium Phosphates (Other, NESOI) imports of $19.9M in April 2026 ran 34% above the year-to-date monthly average of $14.9M.
Last updated: April 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.
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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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| NETHERLANDS | $8.8M | $677K | -$8.1M |
| RUSSIA | $8.4M | -- | -$8.4M |
| CHINA | $1.0M | $95K | -$922K |
| INDIA | $85K | $924K | +$838K |
| MEXICO | $624K | $225K | -$398K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2835260000 | OTHER PHOSPHATES OF CALCIUM, NESOI | $19.9M | 19.84% | $3.8M |
OTHER PHOSPHATES OF CALCIUM, NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2835260000 | OTHER PHOSPHATES OF CALCIUM, NESOI | $7.7M |
OTHER PHOSPHATES OF CALCIUM, NESOI
3.7M kg
URANIUM ENRICHED IN U235 ETC. PLUTONIUM ETC.
HS 284420
NATURAL URANIUM & COMPOUNDS, ALLOYS & CERAMICS ETC
HS 284410
ANHYDROUS AMMONIA
HS 281410
ALLOYS, DISPERSIONS,ISOTOPES & COMPOUNDS NES
HS 284443
SILICON, UNDER 99.99% (BY WEIGHT) SILICON
HS 280469
PHOSPHORIC ACID AND POLYPHOSPHORIC ACIDS
HS 280920
| State | Imports | Exports | Balance |
|---|---|---|---|
| Georgia | $8.5M | $1.7M | -$6.8M |
| Texas | $8.5M | -- | -$8.5M |
| California | $103K | $1.5M | +$1.4M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEW ORLEANS, LA | $8.7M | -- | -$8.7M |
| PHILADELPHIA, PA | $8.5M | -- | -$8.5M |
| SAVANNAH, GA | $78K | $1.8M | +$1.8M |