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HTS Code · Chapter 28 · Updated Oct 6, 2026

2831.90.00.00Dithionites and sulfoxylates

HTS Code 2831.90.00.00 covers any article best defined as Products of the Chemical or Allied IndustriesInorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopesDithionites and sulfoxylates:Other in the Harmonized Tariff Schedule.

Estimated Duty on 2831.90.00.00

$10,000.00 by ocean, entered Oct 6, 2026

Country of origin

China

Total duty

$4,300.00

43% effective rate

Fees

$47.14

MPF + HMF

Duty + fees

$4,347.14

Payable to CBP

Landed cost

$14,347.14

On $10,000.00 customs value

Base duty$550.0012.7%
Section 301 – China$2,500.0057.5%
Section 301 – Forced Labor$1,250.0028.8%
Customs fees$47.141.1%

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Base Duty Rates for 2831.90.00.00

From the Harmonized Tariff Schedule

General Rate of Duty: 5.5%
Special Rate of Duty: Free; AAUBHCLCODEILJOKRMAOMPPAPESSG
Column 2 (Non-NTR): 35%
Units of Quantity: kg

Total duty by countryAll 20 →

China43%
Mexico15.5%
Canada15.5%
Vietnam18%
Germany10%

Tariffs by country · Oct 6, 2026

US Import Duty on HTS 2831.90.00.00 by Country of Origin

As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from China pay 43% in duties: the 5.5% base rate plus Section 301 – China (25%) and Section 301 – Forced Labor (12.5%). Of the 20 largest sources of US imports, the lowest total is 10%, from Germany, Taiwan and 3 more.

Total duty from China

43%

Base rate plus 2 additional tariffs

Lowest total duty

10%

From Germany, Taiwan and 3 more

Countries with additional tariffs

20 of 20

Section 232, 301 and other Chapter 99 duties

Country of origin	Base rate	Additional tariffs	Total duty
China	5.5%	Section 301 – China25%9903.88.03 Section 301 – Forced Labor12.5%9903.05.31	43%
Mexico	5.5%	Section 301 – Forced Labor10%9903.05.55	15.5%0% with USMCA
Canada	5.5%	Section 301 – Forced Labor10%9903.05.29	15.5%0% with USMCA
Vietnam	5.5%	Section 301 – Forced Labor12.5%9903.05.84	18%
Germany	5.5%	Section 301 – Forced Labor4.5%9903.05.39	10%
Japan	5.5%	Section 301 – Forced Labor7%9903.05.49	12.5%
South Korea	5.5%	Section 301 – Forced Labor7%9903.05.71	12.5%
Taiwan	5.5%	Section 301 – Forced Labor4.5%9903.05.76	10%
India	5.5%	Section 301 – Forced Labor10%9903.05.44	15.5%
Ireland	5.5%	Section 301 – Forced Labor4.5%9903.05.39	10%
Italy	5.5%	Section 301 – Forced Labor4.5%9903.05.39	10%
Switzerland	5.5%	Section 301 – Forced Labor7%9903.05.74	12.5%
Thailand	5.5%	Section 301 – Forced Labor12.5%9903.05.77	18%
Malaysia	5.5%	Section 301 – Forced Labor10%9903.05.54	15.5%
United Kingdom	5.5%	Section 301 – Forced Labor10%9903.05.81	15.5%
France	5.5%	Section 301 – Forced Labor4.5%9903.05.39	10%
Indonesia	5.5%	Section 301 – Forced Labor10%9903.05.45	15.5%
Brazil	5.5%	Section 301 – Brazil25%9903.05.01 Section 301 – Forced Labor12.5%9903.05.27	43%
Bangladesh	5.5%	Section 301 – Forced Labor10%9903.05.26	15.5%
Cambodia	5.5%	Section 301 – Forced Labor10%9903.05.28	15.5%

Duty from each country, in words

As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from China pay 43% in duties: the 5.5% base rate plus Section 301 – China (25%) and Section 301 – Forced Labor (12.5%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Mexico pay 15.5% in duties: the 5.5% base rate plus Section 301 – Forced Labor (10%). With USMCA, qualifying goods pay 0%.
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Canada pay 15.5% in duties: the 5.5% base rate plus Section 301 – Forced Labor (10%). With USMCA, qualifying goods pay 0%.
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Vietnam pay 18% in duties: the 5.5% base rate plus Section 301 – Forced Labor (12.5%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Germany pay 10% in duties: the 5.5% base rate plus Section 301 – Forced Labor (4.5%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Japan pay 12.5% in duties: the 5.5% base rate plus Section 301 – Forced Labor (7%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from South Korea pay 12.5% in duties: the 5.5% base rate plus Section 301 – Forced Labor (7%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Taiwan pay 10% in duties: the 5.5% base rate plus Section 301 – Forced Labor (4.5%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from India pay 15.5% in duties: the 5.5% base rate plus Section 301 – Forced Labor (10%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Ireland pay 10% in duties: the 5.5% base rate plus Section 301 – Forced Labor (4.5%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Italy pay 10% in duties: the 5.5% base rate plus Section 301 – Forced Labor (4.5%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Switzerland pay 12.5% in duties: the 5.5% base rate plus Section 301 – Forced Labor (7%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Thailand pay 18% in duties: the 5.5% base rate plus Section 301 – Forced Labor (12.5%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Malaysia pay 15.5% in duties: the 5.5% base rate plus Section 301 – Forced Labor (10%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from United Kingdom pay 15.5% in duties: the 5.5% base rate plus Section 301 – Forced Labor (10%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from France pay 10% in duties: the 5.5% base rate plus Section 301 – Forced Labor (4.5%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Indonesia pay 15.5% in duties: the 5.5% base rate plus Section 301 – Forced Labor (10%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Brazil pay 43% in duties: the 5.5% base rate plus Section 301 – Brazil (25%) and Section 301 – Forced Labor (12.5%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Bangladesh pay 15.5% in duties: the 5.5% base rate plus Section 301 – Forced Labor (10%).
As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Cambodia pay 15.5% in duties: the 5.5% base rate plus Section 301 – Forced Labor (10%).

Duties on goods entered Oct 6, 2026 at the general rate (Column 2 where it applies), with tariff data verified through 2026 HTS Revision 20. Totals are before customs fees (MPF, HMF) and any antidumping or countervailing duties. Some tariffs and exemptions depend on details such as metal content or end use, which the calculator asks about.

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Legal notes

Relevant HTS Notes

Official USITC notes that may affect classification under HTS 2831.90.00.00.

Chapter 28 Notes (includes Section 6 Notes)Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes

CBP rulings

Related CROSS Rulings for HTS 2831.90.00.00

CBP classification rulings related to 2831.90.00.00. Open a ruling to read how Customs classified a similar product.

No rulings found

No CROSS classification rulings were found for HTS code "2831.90.00".

Questions

HTS 2831.90.00.00 FAQ

Something else? Ask us.

What does HTS code 2831.90.00.00 cover?

HTS code 2831.90.00.00 covers dithionites and sulfoxylates (Other), classified under Chapter 28 (Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes) in the US Harmonized Tariff Schedule. The general duty rate is 5.5%.

What is the duty rate for HTS 2831.90.00.00?

The general (Column 1) rate of duty for HTS 2831.90.00.00 is 5.5%. Goods that qualify for a trade program can enter at the special rate: Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG). The Column 2 rate, for countries without normal trade relations, is 35%. Additional Chapter 99 tariffs, such as Section 301 and Section 232, can apply on top depending on the country of origin.

What is the US tariff on dithionites and sulfoxylates (HTS 2831.90.00.00) from China?

What is the US tariff on dithionites and sulfoxylates (HTS 2831.90.00.00) from Vietnam?

As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Vietnam pay 18% in duties: the 5.5% base rate plus Section 301 – Forced Labor (12.5%).

What is the US tariff on dithionites and sulfoxylates (HTS 2831.90.00.00) from Mexico?

As of Oct 6, 2026, US imports of dithionites and sulfoxylates (HTS 2831.90.00.00) from Mexico pay 15.5% in duties: the 5.5% base rate plus Section 301 – Forced Labor (10%). Goods that qualify for USMCA pay 0%.

Which country has the lowest US duty on HTS 2831.90.00.00?

Of the 20 largest sources of US imports, the lowest total duty on HTS 2831.90.00.00 is 10%, from Germany, Taiwan and 3 more, as of the tariffs in effect on 2026-10-06.

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