HTS 2811Other inorganic acids and other inorganic oxygen compounds of nonmetals

Product or HTS code

Rate lines13

Code	Description	General	Special	Column 2	Units
	Other inorganic acids
2811.11.00.00	2811.11.00.00Hydrogen fluoride (Hydrofluoric acid)General Free · Column 2 Free · kg	Free		Free	kg
2811.12.00.00	2811.12.00.00Hydrogen cyanide (hydrocyanic acid)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% · kg	4.2%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	25%	kg
2811.19	2811.19Other
2811.19.10.00	2811.19.10.00Arsenic acidGeneral 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% · kg	2.3%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	4.9%	kg
2811.19.30.00	2811.19.30.00Hydrobromic acidGeneral Free · Column 2 25% · kg	Free		25%	kg
2811.19.61	2811.19.61OtherGeneral 4.2% · Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 25%	4.2%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	25%
2811.19.61.10	2811.19.61.10Sulfamic acidGeneral 4.2% · Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 25% · kg	4.2%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	25%	kg
2811.19.61.90	2811.19.61.90OtherGeneral 4.2% · Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 25% · kg	4.2%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	25%	kg
	Other inorganic oxygen compounds of nonmetals
2811.21.00.00	2811.21.00.00Carbon dioxideGeneral 3.7% · Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 25% · t	3.7%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	25%	t
2811.22	2811.22Silicon dioxide
2811.22.10.00	2811.22.10.00Synthetic silica gelGeneral 3.7% · Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 25% · kg	3.7%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	25%	kg
2811.22.50.00	2811.22.50.00OtherGeneral Free · Column 2 Free · kg	Free		Free	kg
2811.29	2811.29Other
2811.29.10.00	2811.29.10.00Arsenic trioxideGeneral Free · Column 2 Free · kg	Free		Free	kg
2811.29.20.00	2811.29.20.00Selenium dioxideGeneral Free · Column 2 Free · kg	Free		Free	kg
2811.29.30.00	2811.29.30.00Sulfur dioxideGeneral 4.2% · Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 25% · kg	4.2%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	25%	kg
2811.29.50.00	2811.29.50.00OtherGeneral 3.7% · Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 25% · kg	3.7%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	25%	kg
	III. HALOGEN OR SULFUR COMPOUNDS OF NONMETALS

2026 HTS Revision 21 (October 9, 2026)

Duty by country of origin

Rate line	China25.7% of imports	Mexico24.41% of imports	Japan9.44% of imports	Germany8.65% of imports	Taiwan4.33% of imports	Austria3.27% of imports	Canada3.26% of imports	India2.88% of imports	Israel2.63% of imports	South Korea2.12% of imports
2811.11.00.00Hydrogen fluoride (Hydrofluoric acid)	25%9903.88.03	0%	0%	0%	0%	0%	0%	0%	0%	0%
2811.12.00.00Hydrogen cyanide (hydrocyanic acid)	41.7%9903.05.319903.88.03	14.2%9903.05.55	12.5%9903.05.49	10%9903.05.39	10%9903.05.76	10%9903.05.39	14.2%9903.05.29	14.2%9903.05.44	16.7%9903.05.47	12.5%9903.05.71
2811.19.10.00Arsenic acid	9.8%9903.88.15	2.3%	2.3%	2.3%	2.3%	2.3%	2.3%	2.3%	2.3%	2.3%
2811.19.30.00Hydrobromic acid	37.5%9903.05.319903.88.03	10%9903.05.55	12.5%9903.05.49	10%9903.05.39	10%9903.05.76	10%9903.05.39	10%9903.05.29	10%9903.05.44	12.5%9903.05.47	12.5%9903.05.71
2811.19.61.10Sulfamic acid	From 41.7%9903.05.319903.88.03AD/CVD may apply	14.2%9903.05.55	12.5%9903.05.49	10%9903.05.39	10%9903.05.76	10%9903.05.39	14.2%9903.05.29	14.2%9903.05.44	16.7%9903.05.47	12.5%9903.05.71
2811.19.61.90Other	From 41.7%9903.05.319903.88.03AD/CVD may apply	14.2%9903.05.55	12.5%9903.05.49	10%9903.05.39	10%9903.05.76	10%9903.05.39	14.2%9903.05.29	14.2%9903.05.44	16.7%9903.05.47	12.5%9903.05.71
2811.21.00.00Carbon dioxide	41.2%9903.05.319903.88.03	13.7%9903.05.55	12.5%9903.05.49	10%9903.05.39	10%9903.05.76	10%9903.05.39	13.7%9903.05.29	13.7%9903.05.44	16.2%9903.05.47	12.5%9903.05.71
2811.22.10.00Synthetic silica gel	41.2%9903.05.319903.88.03	13.7%9903.05.55	12.5%9903.05.49	10%9903.05.39	10%9903.05.76	10%9903.05.39	13.7%9903.05.29	13.7%9903.05.44	16.2%9903.05.47	12.5%9903.05.71
2811.22.50.00Other	37.5%9903.05.319903.88.03	10%9903.05.55	12.5%9903.05.49	10%9903.05.39	10%9903.05.76	10%9903.05.39	10%9903.05.29	10%9903.05.44	12.5%9903.05.47	12.5%9903.05.71
2811.29.10.00Arsenic trioxide	25%9903.88.03	0%	0%	0%	0%	0%	0%	0%	0%	0%
2811.29.20.00Selenium dioxide	25%9903.88.03	0%	0%	0%	0%	0%	0%	0%	0%	0%
2811.29.30.00Sulfur dioxide	41.7%9903.05.319903.88.03	14.2%9903.05.55	12.5%9903.05.49	10%9903.05.39	10%9903.05.76	10%9903.05.39	14.2%9903.05.29	14.2%9903.05.44	16.7%9903.05.47	12.5%9903.05.71
2811.29.50.00Other	41.2%9903.05.319903.88.03	13.7%9903.05.55	12.5%9903.05.49	10%9903.05.39	10%9903.05.76	10%9903.05.39	13.7%9903.05.29	13.7%9903.05.44	16.2%9903.05.47	12.5%9903.05.71

Total duty on a $10,000 ocean shipment entered 2026-10-13, before customs fees. Origins are the leading sources of US imports under this heading in 2025 (US Census Bureau).