Section VI · Organic chemicals
2933.52
Malonylurea (Barbituric acid) and its salts:
Chapter
Organic chemicals
Heading
The product family within the chapter
Subheading
The specific good, identical worldwide
The first six digits are the same in every country that uses the Harmonized System. The United States adds two more for the tariff rate and, often, two more for statistics — which is why the rates below are listed against 8- and 10-digit numbers rather than against this code.
How the schedule reaches this code
- 29Organic chemicals
- 2933Heterocyclic compounds with nitrogen hetero-atom(s) only:
- Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure:
- Malonylurea (Barbituric acid) and its salts:
Published US duty rates
Duty is set at the 8- or 10-digit line, not at this 6-digit subheading, so more than one rate can sit under this code.
- 2933.52.10.00Malonylurea (barbituric acid)kg
- General
- Free
- Special (FTA)
- —
- Column 2
- 25%
No preferential rate published.
Countries without normal trade relations.
- 2933.52.90.00Otherkg
- General
- Free
- Special (FTA)
- —
- Column 2
- 50%
No preferential rate published.
Countries without normal trade relations.
This is the listed rate. Antidumping and countervailing duty orders, Chapter 99 actions and preference qualification all change what is actually collected, and classification is a judgement about your goods. Verify with your licensed customs broker before you file.
Other subheadings in heading 2933
- 2933.11Phenazone (Antipyrine) and its derivatives
- 2933.19Other:
- 2933.21Hydantoin and its derivatives
- 2933.29Other:
- 2933.31Pyridine and its salts
- 2933.32Piperidine and its salts:
- 2933.33Alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN), dipipanone (INN), fentanyl (INN), ketobemidone (INN), methylphenidate (INN), pentazocine (INN), pethidine (INN), pethidine (INN) intermediate A, phencyclidine (INN) (PCP), phenoperidine (INN), pipradrol (INN), piritramide (INN), propiram (INN), remifentanil (INN) and trimeperidine (INN); salts thereof
- 2933.34Other fentanyls and their derivatives
- 2933.353-Quinuclidinol
- 2933.364-Anilino-N-phenethylpiperidine (ANPP)
- 2933.37N-Phenethyl-4-piperidone (NPP)
- 2933.39Other:
- 2933.41Levorphanol (INN) and its salts
- 2933.49Other:
- 2933.53Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital, cyclobarbital (INN), methylphenobarbital (INN), pentobarbital (INN), phenobarbital (INN), secbutabarbital (INN), secobarbital (INN) and vinylbital (INN); salts thereof
- 2933.54Other derivatives of malonylurea (barbituric acid); salts thereof
- 2933.55Loprazolam (INN), mecloqualone (INN), methaqualone (INN) and zipeprol (INN); salts thereof
- 2933.59Other:
- 2933.61Melamine
- 2933.69Other:
- 2933.716-Hexanelactam (ε-Caprolactam)
- 2933.72Clobazam (INN) and methyprylon (INN)
- 2933.79Other lactams:
- 2933.91Alprazolam (INN), camazepam (INN), chlordiazepoxide (INN), clonazepam (INN), clorazepate, delorazepam (INN), diazepam (INN), estazolam (INN), ethyl loflazepate (INN), fludiazepam (INN), flunitrazepam (INN), flurazepam (INN), halazepam (INN), lorazepam (INN), lormetazepam (INN), mazindol (INN), medazepam (INN), midazolam (INN), nimetazepam (INN), nitrazepam (INN), nordazepam (INN), oxazepam (INN), pinazepam (INN), prazepam (INN), pyrovalerone (INN), temazepam (INN), tetrazepam (INN) and triazolam (INN); salts thereof
- 2933.92Azinphos-methyl
- 2933.99Other:
Source: U.S. International Trade Commission (USITC) — 2026 HTS Revision 12, released 2026-07-21, published at hts.usitc.gov. A U.S. Government work in the public domain.