Heading 2925

Carboxyimide-function compounds (including saccharin and its salts) and imine-function compounds

14 declarable lines

Heading 2925 covers carboxyimide-function compounds, including saccharin and its salts, and imine-function compounds. It splits first by function: imides and their derivatives in 2925.11 through 2925.19, and imines and their derivatives in 2925.21 through 2925.29. Within each group the lines move from specific named compounds to aromatic and then other residual lines, with mixed duty rates.

Products in this heading

Saccharin and saccharin salts used as artificial sweeteners
Glutethimide
N-Chlorosuccinimide used as a chlorinating and oxidizing agent
Bis(o-tolyl)carbodiimide used as a crosslinking agent
N,N'-Diphenylguanidine used as a rubber accelerator
Tetramethylguanidine used as an organic base catalyst
Chlordimeform, an acaricide and insecticide
Pentamidine and bunamidine hydrochloride

How to choose the right subheading

Whether the compound carries an imide function (heading 2925 imide lines) or an imine function (the imine lines).
Whether the compound is one of the specific chemicals named in a line, which takes priority over the residual Other lines.
For imide lines, whether the compound is aromatic or not.
For imine lines, whether the compound is aromatic or other, and whether it is a drug.
Whether the compound has a separate specific heading elsewhere in chapter 29, such as 2924 for amides or 2941 for antibiotics.

Often confused with

Saccharin put up as a retail sweetener tablet or powder preparation
Once it becomes a food preparation rather than the separate compound, it leaves chapter 29.
Heading 2106
Acetaminophen (paracetamol)
It is a carboxyamide-function compound, not an imide or imine.
Heading 2924
Aniline and other simple amines
These carry an amine function, which is classified in heading 2921.
Heading 2921
Sucralose
It is a heterocyclic compound with oxygen hetero-atoms only.
Heading 2932
Penicillins and other antibiotics
Antibiotics have their own heading regardless of functional groups.
Heading 2941

Frequently asked questions

What is the HTS code for saccharin and its salts?

Saccharin and its salts are classified under 2925.11.00.00, with a general (MFN) rate of 6.5%.

What is the duty on N-chlorosuccinimide?

N-Chlorosuccinimide falls under 2925.19.70.00, which carries a general (MFN) rate of Free.

How do I classify tetramethylguanidine?

Tetramethylguanidine is an imine-function compound named in 2925.29.70.00, dutiable at a general (MFN) rate of Free. An imine compound not named in a specific line and not aromatic would fall in 2925.29.90.00 at 3.7%.

Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.