HTS 2831.10.10.00 · Chapter 28
Sodium formaldehyde sulfoxylate
General (MFN) duty, special preferential rates, and where HTS 2831.10.10.00 sits in the US Harmonized Tariff Schedule.
- Free
- General (MFN) rate
- None
- Special / FTA rate
- 35%
- Column 2 (non-MFN)
- Ch 28
- Inorganic chemicals; o…
According to the U.S. International Trade Commission Harmonized Tariff Schedule 2026 Basic Edition, PlainTariff indexes 13,855 Column 1 general-rate tariff lines across 96 chapters as of August 2026. See our methodology for how rates are parsed and when the USITC vintage updates.
The verdict
According to the USITC HTS 2026 Basic Edition duty-free cohort on PlainTariff, HTS 2831.10.10.00 ranks #813 of 5979 among Free general-rate tariff lines (ordered by chapter, matching /rankings/free-trade).
- Free
- General (MFN) rate
- #813 of 5979
- among duty-free lines
- Ch 28
- Inorganic chemicals; o…
Where HTS 2831.10.10.00 sits in the US duty-rate distribution
All rate-bearing tariff lines in the USITC HTS 2026 Basic Edition; this is a rate comparison, not a classification recommendation.
0% Duty-free at the lowest observed value among 13,544 rate-bearing tariff lines
USITC tariff lines grouped by their published general (MFN) duty rate
Each bar is a published general (MFN) duty-rate band; taller bars hold more rate-bearing tariff lines. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source US International Trade Commission Harmonized Tariff Schedule · 2026-05-15
About HTS 2831.10.10.00
HTS code 2831.10.10.00 classifies imports of: Sodium formaldehyde sulfoxylate. This line sits within Chapter 28 (Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes), Section VI (Products of the Chemical or Allied Industries), and is catalogued as a tariff line in the USITC 2026 Basic Edition. Duty is calculated against units of quantity: kg. A footnote applies to this classification: See 9903.88.03.
The general (MFN / Column 1 General) rate for HTS 2831.10.10.00 is Free, which applies to most trading partners of the United States. No special preferential rate is listed for this line, so FTA origin alone will not reduce the general duty. The Column 2 rate of 35% applies to imports from non-MFN countries such as Cuba and North Korea, a much higher historical "full" tariff. Because the general rate is Free, most imports under this code enter the US without duty, though anti-dumping, countervailing, or Section 301 tariffs can still apply depending on country of origin.
Footnotes: See 9903.88.03. Beyond the published rate, importers should check for Section 201 safeguards, Section 301 China tariffs, and any active AD/CVD orders that can materially change the real landed cost. Always verify the classification with a licensed customs broker before committing to a supply contract, this page is a research tool, not a customs ruling.
Duty Rate Summary, HTS 2831.10.10.00
| Rate Column | Value | Applies To |
|---|---|---|
| General (Column 1) | Free | Most-favored-nation (MFN) trading partners, the default rate for most US imports. |
| Special | Not listed | Preferential rates under FTAs (USMCA, CAFTA-DR, GSP, etc.) when origin qualifies. |
| Column 2 | 35% | Statutory non-MFN rate for goods from countries without normal trade relations (Cuba, North Korea). |
Source: USITC Harmonized Tariff Schedule 2026 Basic Edition. See methodology for refresh cadence.
Details
- Units of Quantity
- kg
- Classification
- Tariff Line
- Footnotes
- See 9903.88.03.
Related Items in Chapter 28
Showing 10 of 273 tariff lines in HTS Chapter 28.
Chlorine
Iodine
Fluorine
Bromine
Sulfur, sublimed or precipitated; colloidal sulfur
Carbon (carbon blacks and other forms of carbon not elsewhere specified or included)
Hydrogen
Argon
Other
Nitrogen
Next steps
HTS 2831.10.10.00 is one line in the schedule. Drill up to the chapter or out to tools and rankings.
- Browse 273 tariff lines in Chapter 28. Chapter 28
- See all 11 chapters under Section VI. Section VI
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Preferential (Special) rates and Section 301/232 duties may change the duty a shipment actually pays.
Frequently Asked Questions
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Sources: U.S. International Trade Commission Harmonized Tariff Schedule (2026 Basic Edition) and FAO FAOSTAT Trade: Crops and Livestock. See our methodology for how figures are computed.
Every figure on PlainTariff is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.