Lactam (Beta-Propiolactam)
Beta-propiolactam is a strained four-membered ring lactam amide used as a monomer in polymer production, including nylon precursors. Despite its ring structure, it is classified as an acyclic amide derivative under this tariff item because the ring is not a heterocyclic ring for classification purposes. It is a separate chemically defined organic compound, meeting the criteria of Chapter 29 Note 1(a).
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the lactam ring is considered a heterocyclic structure with nitrogen
Lactams with a nitrogen-containing ring may be classified as heterocyclic compounds under heading 29.33, which occurs later in numerical order.
If the compound is presented as a cyclic amide rather than acyclic
Other cyclic amides fall under subheading 2924.29, but the acyclic classification is preferred for this four-membered ring.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the beta-propiolactam is a separate chemically defined compound with no added substances beyond permitted stabilizers
• Declare the CAS number and purity on the commercial invoice to support classification
• Verify if the product requires a permit under the Controlled Drugs and Substances Act, as some lactams are monitored
Related Products under Tariff item 2924.19.00
Acetamide
Acetamide is a simple acyclic amide derived from acetic acid, with the chemical formula CH3CONH2. It is used as a solvent, plasticizer, and in organic synthesis. As a separate chemically defined organic compound, it falls under tariff item 2924.19.00 for other acyclic amides.
Acetamide Sodium Salt
Sodium acetamide is the sodium salt of acetamide, used in organic reactions and buffers. Per Chapter 29 note 5(C)(1), inorganic salts of organic compounds are classified with the organic compound, so it falls under tariff item 2924.19.00.
Acrylamide
Acrylamide (CH2=CHCONH2), an acyclic amide monomer used for polyacrylamide production. It is a separate chemically defined organic compound, classified under 2924.19.00 as an 'Other' acyclic amide.
Acrylamide Flake Form Stabilized
Acrylamide in flake form with a polymerization inhibitor (e.g., copper sulfate <0.1%) is a chemically defined acyclic amide. The stabilizer is permitted under Chapter 29 note 1(f) as necessary for transport, so it falls under tariff item 2924.19.00.
Acrylamide Monomer
Acrylamide monomer (CH2=CHCONH2) is a chemically defined acyclic amide used primarily as a monomer in polymerization reactions. It falls under tariff item 2924.19.00 as an other acyclic amide.
Acrylamide with MEHQ Inhibitor
Acrylamide with 30-50 ppm MEHQ (4-methoxyphenol) as a polymerization inhibitor is a chemically defined acyclic amide. The stabilizer is allowed under Chapter 29 note 1(f), so it falls under tariff item 2924.19.00.