HTS heading 2925 · Chapter 29

HTS 2925: Carboxyimide-function compounds and imine-function…

HTS heading 2925 covers carboxyimide-function compounds (including saccharin and its salts) and imine-function compounds. It has 14 tariff lines with a duty rate; the general (MFN) rates are 6.5% (7 lines), Free (5 lines), 3.7% (2 lines).

Imports may also owe Chapter 99 tariffs (Section 232, 301 or 201) depending on origin and date, plus the Merchandise Processing Fee and, by sea, the Harbor Maintenance Fee.

Rates from the 2026 HTS Revision 22, effective October 30, 2026. Source: U.S. International Trade Commission.

HTS code

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Country of origin

Customs value (USD)

Mode of transport

Entry date

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Tariff lines and duty rates

HTS code	Description	General	Special	Column 2	Estimate
	Imides and their derivatives; salts thereof:
2925.11.00.00	Saccharin and its salts[kg]	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 61%	Estimate →
2925.12.00.00	Glutethimide (INN)[kg]	Free		15.4¢/kg + 61%	Estimate →
2925.19	Other:
	Aromatic:
2925.19.10.00	Ethylenebistetrabromophthalimide[kg]	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO, KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 61%	Estimate →
2925.19.30.00	Bis(o-tolyl)carbodiimide; and 2,2',6,6'-Tetra isopropyl diphenyl carbodiimide[kg]	Free		15.4¢/kg + 61%	Estimate →
2925.19.42.00	Other[kg]	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 61%	Estimate →
	Other:
2925.19.70.00	N-Chlorosuccinimide; andN,N'-Ethylene bis (5,6-dibromo-2,3- norbornane dicarboximide)[kg]	Free		25%	Estimate →
2925.19.91.00	Other[kg]	3.7%	Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,L,MA,OM,P,PA,PE,S,SG)	25%	Estimate →
	Imines and their derivatives; salts thereof:
2925.21.00.00	Chlordimeform (ISO)[kg]	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO, K,KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 61%	Estimate →
2925.29	Other:
	Aromatic:
2925.29.10.00	N'-(4-Chloro-o-tolyl)-N,N- diemthylformamidine; Bunamidine hydrochloride; and Pentamidine[kg]	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 41%	Estimate →
2925.29.18.00	N,N'-Diphenylguanidine; 3-Dimethyl amino methyleneiminophenol hydrochloride; 1,3-Di-o-tolylguanidine; andN,N-Dimethyl-N'-[3-[[(methylamino) carbonyl]- oxy] phenyl] methanimidamide monohydro- chloride[kg]	Free		15.4¢/kg + 61%	Estimate →
	Other:
2925.29.20.00	Drugs[kg]	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO, K,KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 67.5%	Estimate →
2925.29.60.00	Other[kg]	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 61%	Estimate →
	Other:
2925.29.70.00	Tetramethylguanidine[kg]	Free		25%	Estimate →
2925.29.90.00	Other[kg]	3.7%	Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)	25%	Estimate →

14 lines shown. Statistical suffixes (the last two digits) inherit the rate of the 8-digit subheading above them.

Example: base duty and fees on $10000

For HTS 2925.11.00.00 at the general rate of 6.5%, shipped by ocean, before any Chapter 99 tariffs:

Base duty (6.5%)	$650.00
Merchandise Processing Fee (0.3464%, min $34.58)	$34.64
Harbor Maintenance Fee (0.125%)	$12.50
Duty and fees	$697.14

Origin-specific tariffs can multiply this. Run this example from China or from Mexico to see every line.

Special program codes in this heading

A, A*, A+: Generalized System of Preferences (GSP)
AU: U.S.–Australia FTA
BH: U.S.–Bahrain FTA
CL: U.S.–Chile FTA
CO: U.S.–Colombia Trade Promotion Agreement
D: African Growth and Opportunity Act (AGOA)
E, E*: Caribbean Basin Economic Recovery Act
IL: U.S.–Israel FTA
JO: U.S.–Jordan FTA
K: Agreement on Trade in Pharmaceutical Products
KR: U.S.–Korea FTA (KORUS)
L: Uruguay Round concessions on intermediate chemicals for dyes
MA: U.S.–Morocco FTA
OM: U.S.–Oman FTA
P, P+: CAFTA-DR
PA: U.S.–Panama Trade Promotion Agreement
PE: U.S.–Peru Trade Promotion Agreement
S, S+: USMCA (United States–Mexico–Canada Agreement)
SG: U.S.–Singapore FTA

A special rate applies only when the goods qualify under that program's rules of origin and the claim is made at entry.

Frequently asked questions

What is the duty rate for HTS 2925?

Heading 2925 has 14 rate lines. The general (MFN) duty rates are 6.5% (7 lines), Free (5 lines), 3.7% (2 lines). Products of free trade agreement partners may enter at the special rate, and Column 2 rates apply to countries without normal trade relations. Chapter 99 tariffs can be added on top: calculate the full amount.

Do Section 301, 232 or 201 tariffs apply to HTS 2925?

It depends on the 8- or 10-digit subheading, the country of origin, the entry date and, for Section 232, the metal content. These additional duties are listed in Chapter 99 of the HTS. The free duty calculator checks each program for a given code, origin and date and shows which apply and why.

What fees are added to an import under HTS 2925?

Formal entries pay the Merchandise Processing Fee of 0.3464% of value (minimum $34.58, maximum $670.86 in FY2027). Ocean shipments also pay the Harbor Maintenance Fee of 0.125% of value. See the import duty calculator for how they combine.