Heading 2930

Organo-sulfur compounds

40 declarable lines

Heading 2930 covers chemically defined organo-sulfur compounds, meaning molecules whose sulfur is bonded to carbon. The heading starts with lines for specific named compounds (2930.10 through 2930.80, such as methionine and thiocarbamates) and then puts everything else in 2930.90, which splits by aromatic versus other structure, by pesticide or rubber-processing use, and by acid function.

Products in this heading

Methionine, an amino acid used in animal feed and pharmaceuticals
Thioglycolic acid, used in hair care and depilatory products
Tetramethylthiuram monosulfide, a rubber accelerator and fungicide
Malathion and phorate, agricultural insecticides
Acetylcysteine, a mucolytic drug ingredient
2-Ethylhexyl mercaptoacetate, a chemical intermediate
Dimethyl sulfide, a flavor and industrial solvent compound
Dibutylthiourea, a rubber and chemical intermediate

How to choose the right subheading

Check whether the compound is named in a specific line, such as methionine or a thiocarbamate, before considering 2930.90.
Determine whether the molecule is aromatic or other, since 2930.90 splits on that first.
Identify the end use: pesticide lines and rubber-processing lines carry different rates than plain other lines.
Check for an acid function, especially mercaptocarboxylic acids, which have their own lines under 2930.90.49.
Check whether a phosphorus atom carries only methyl, ethyl, n-propyl or isopropyl groups, which triggers dedicated pesticide and other lines.

Often confused with

Sulfonamides such as sulfamethoxazole
The sulfur is part of a sulfonamide function, which has its own heading.
Heading 2935
Thiophene and other sulfur heterocycles
Ring structure with a sulfur hetero-atom takes the heterocyclic heading.
Heading 2934
Benzene sulfonic acid and other sulfonated hydrocarbons
Sulfonated hydrocarbon derivatives are classified with the parent hydrocarbon family.
Heading 2904
Tetraethyl lead and other organo-inorganic sulfur compounds
Compounds where the sulfur is part of a broader organo-inorganic structure go to 2931.
Heading 2931
Penicillin and other antibiotics
Antibiotics are named in their own heading regardless of sulfur content.
Heading 2941

Frequently asked questions

What is the HTS code for methionine?

Methionine is classified under 2930.40.00.00. The general (MFN) rate for that line is Free.

What is the duty on tetramethylthiuram monosulfide?

Tetramethylthiuram monosulfide falls under 2930.30.30.00. The general (MFN) rate is Free, while other thiuram mono-, di- and tetrasulfides under 2930.30.60.00 pay 3.7%.

How do I classify acetylcysteine?

Acetylcysteine is a mercaptocarboxylic acid, so it goes under 2930.90.49.40. The general (MFN) rate for that line is 4.2%.

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.