HTS Heading 2811

Other inorganic acids and other inorganic oxygen compounds of nonmetals

All 13 HTS codes under heading 2811 (other inorganic acids), with their duty rates from the 2026 HTS Revision 23. General duty Free to 4.2%.

Every line of heading 2811

  • 2811 Other inorganic acids and other inorganic oxygen compounds of nonmetals.
  • 2811.11.00.00 Hydrogen fluoride (Hydrofluoric acid) (kg): General Free; Special none; Column 2 Free.
  • 2811.12.00.00 Hydrogen cyanide (hydrocyanic acid) (kg): General 4.2%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2811.19 Other (under: Other inorganic acids).
  • 2811.19.10.00 Arsenic acid (under: Other) (kg): General 2.3%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 4.9%.
  • 2811.19.30.00 Hydrobromic acid (under: Other) (kg): General Free; Special none; Column 2 25%.
  • 2811.19.61 Other (under: Other): General 4.2%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2811.19.61.10 Sulfamic acid (under: Other) (kg).
  • 2811.19.61.90 Other (under: Other) (kg).
  • 2811.21.00.00 Carbon dioxide (under: Other inorganic oxygen compounds of nonmetals) (t): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2811.22 Silicon dioxide (under: Other inorganic oxygen compounds of nonmetals).
  • 2811.22.10.00 Synthetic silica gel (under: Silicon dioxide) (kg): General 3.7%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2811.22.50.00 Other (under: Silicon dioxide) (kg): General Free; Special none; Column 2 Free.
  • 2811.29 Other (under: Other inorganic oxygen compounds of nonmetals).
  • 2811.29.10.00 Arsenic trioxide (under: Other) (kg): General Free; Special none; Column 2 Free.
  • 2811.29.20.00 Selenium dioxide (under: Other) (kg): General Free; Special none; Column 2 Free.
  • 2811.29.30.00 Sulfur dioxide (under: Other) (kg): General 4.2%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2811.29.50.00 Other (under: Other) (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.

Last reviewed 2026-11-12.