26,806 official source entries are searchable. Checked 2026-09-22; edition published 2026-09-15.
Printed tariff and statistical lines from this edition, separate from historical WITS averages. Blank duty cells are not a confirmed zero. Review the parent tariff line, general and chapter notes, chapter 99, origin, exclusions, quotas and additional duties. No shipment total or special-rate eligibility is calculated. The edition publication date is not a line-level effective date.
Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined: › Polyphosphates:
Sodium triphosphate (Sodium tripolyphosphate)
Source units: kg
Reported average: 1.39999997615814%.
Source year: 2023. Classification: HS 2022 (H6). Checked 2026-09-14.
National lines included: 1 of 1. Excluded from the average: 0.
Reported ad-valorem range: 1.39999997615814%–1.39999997615814%.
Reported historical ad-valorem MFN simple average for 2023, not a national tariff schedule. No preferential rates, additional duties, VAT, excise or import permissions are determined.
Not a current 2026 national duty. The HS6 average does not determine the duty of a particular national subdivision, origin or shipment.
WITS observation for this code and year
UN Comtrade H6 descriptions (HS 2022)
WITS API definitions: reported averages and excluded national lines
Direct HS code answer for United States
The source reports an indicative HS6 MFN average of 1.40% (2023 MFN average) for Polyphosphates; sodium triphosphate (sodium tripolyphosphate), whether or not chemically defined.Source status: not assessed. Verify the exact national tariff line, origin treatment, taxes, restrictions, and current customs guidance before using this information in a declaration.
1.40% (2023 MFN average)
not assessed
Import planning
Request a one-page research summary with source checks, landed-cost inputs, and points to verify for HS code 283531 in United States.
Each destination shows its own source label. Oman uses its national schedule; Qatar and UAE entries may cite their separately published references and unresolved exceptions. Other entries retain the historical GCC reference. National codes, duty notes, restrictions and tax treatment can differ; verify with the destination customs authority.
| HS Code | Description | Duty |
|---|---|---|
| 283510 | Phosphinates (hypophosphites) and phosphonates (phosphites), whether or not chemically defined | 3.10% (2023 MFN average)WITS 2023 historical MFN average |
| 283522 | Phosphates; of mono- or disodium, whether or not chemically defined | 1.40% (2023 MFN average)WITS 2023 historical MFN average |
| 283524 | Phosphates; of potassium, whether or not chemically defined | 3.10% (2023 MFN average)WITS 2023 historical MFN average |
| 283525 | Phosphates; calcium hydrogenorthophosphate (dicalcium phosphate), whether or not chemically defined | 0.00% (2023 MFN average)WITS 2023 historical MFN average |
| 283526 | Phosphates; of calcium n.e.c. in item no. 2835.25, whether or not chemically defined | 0.00% (2023 MFN average)WITS 2023 historical MFN average |
| 283529 | Phosphates; (other than of mono- or disodium, other than of potassium or of calcium hydrogenorthophosphate (dicalcium phosphate) and excluding other phosphates of calcium), whether or not chemically defined | 1.95% (2023 MFN average)WITS 2023 historical MFN average |
| 283539 | Polyphosphates; other than sodium triphosphate (sodium tripolyphosphate), whether or not chemically defined | 3.40% (2023 MFN average)WITS 2023 historical MFN average |
Data source: WITS/UNCTAD TRAINS (MFN 2022). Values are indicative HS6 MFN averages, not shipment-specific applied rates. Import permission and restrictions are not assessed. Historical reference rates exclude VAT, excise and other national measures. Separate national entries preserve the columns printed by their source; these are not a complete shipment assessment. Full disclaimer.