HS Code 2933Heterocyclic compounds with nitrogen hetero-atom(s) only
27 six-digit codes · Heading 33 of 42 in Chapter 29 · World Customs Organization Harmonized System
HS code 2933 is the heading for nitrogen heterocyclics: ring-shaped organic chemicals whose rings hold nitrogen and no other hetero-atom.
Heading 2933 is finely cut: 27 six-digit codes, 293311 to 293399, all of them under “Heterocyclic compounds with nitrogen hetero-atom(s) only”. At that depth it is the exact wording of the code, not of the heading, that settles a classification. The heading is number 33 of 42 in Chapter 29, Organic chemicals, which runs to 410 six-digit codes in all.
Six-digit codes under heading 2933
| HS Code | Import–export description |
|---|---|
| 293311 | Heterocyclic compounds; with nitrogen hetero-atom(s) only, containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, phenazone (antipyrin) and its derivatives |
| 293319 | Heterocyclic compounds; with nitrogen hetero-atom(s) only, containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, other than henazone (antipyrin) and its derivatives |
| 293321 | Heterocyclic compounds; with nitrogen hetero-atom(s) only, containing an unfused imidazole ring (whether or not hydrogenated) in the structure, hydantoin and its derivatives |
| 293329 | Heterocyclic compounds; with nitrogen hetero-atom(s) only, containing an unfused imidazole ring (whether or not hydrogenated) in the structure, other than hydantoin and its derivatives |
| 293331 | Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, pyridine and its salts |
| 293332 | Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, piperidine and its salts |
| 293333 | Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, alfentanil (inn), anileridine (inn), bezitramide (inn), bromazepam (inn), carfentanil (inn), difenoxin (inn), diphenoxylate (inn), dipipanone (inn) |
| 293334 | Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, other fentanyls and their derivatives |
| 293335 | Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, 3-quinuclidinol |
| 293336 | Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, 4-anilino-n-phenethylpiperidine (anpp) |
| 293337 | Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, n-phenethyl-4-piperdone (npp) |
| 293339 | Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, n.e.c. in 2933.3 |
| 293341 | Heterocyclic compounds; containing a quinoline or isoquinoline ring-system (whether or not hydrogenated) in the structure, not further fused, levorphanol (inn) and its salts |
| 293349 | Heterocyclic compounds; containing a quinoline or isoquinoline ring-system (whether or not hydrogenated) in the structure, not further fused, other than levorphanol (inn) and its salts |
| 293352 | Heterocyclic compounds; containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, malonylurea (barbituric acid) and its salts |
| 293353 | Allobarbital (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 |
| 293354 | Heterocyclic compounds; containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, other derivatives of malonylurea (barbituric acid) and salts thereof, n.e.c. in 2933.53 |
| 293355 | Heterocyclic compounds; containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure; loprazolam (inn), mecloqualone (inn), methaqualone (inn), and zipeprol (inn); salts thereof |
| 293359 | Heterocyclic compounds; containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, (other than malonylurea and its derivatives, loprazolam, mecloqualone, methaqualone, zipeprol, and salts thereof) n.e.c. in 2933.5 |
| 293361 | Heterocyclic compounds; containing an unfused triazine ring (whether or not hydrogenated) in the structure, melamine |
| 293369 | Heterocyclic compounds; containing an unfused triazine ring (whether or not hydrogenated) in the structure, others excluding melamine |
| 293371 | Heterocyclic compounds; lactams; 6-hexanelactam (epsilon-caprolactam) |
| 293372 | Heterocyclic compounds; lactams; clobazam (inn) and methyprylon (inn) |
| 293379 | Heterocyclic compounds; lactams; other than 6-hexanelactam (epsilon caprolactam) and clobazam (inn) and methyprylon (inn) |
| 293391 | Heterocyclic compounds; alprazolam (inn), camazepam (inn), chlordiazepoxide (inn), clonazepam (inn), clorazepate, delorazepam (inn), diazepam (inn), estazolam (inn), ethyl loflazepate (inn), fludiazepam (inn), flunitrazepam (inn), (cont) |
| 293392 | Heterocyclic compounds; azinphos-methyl (iso) |
| 293399 | Heterocyclic compounds; n.e.c. in headings no. 2933 |
What HS code 2933 covers
A heterocyclic compound has a ring made of more than one kind of atom. Carbon is one of them. The other kind is called the hetero-atom. Heading 2933 holds the rings where the only hetero-atom is nitrogen.
Buyers often search for these goods as nitrogen heterocyclics. They fall inside chapter 29 organic chemicals. Some countries call the same list the HSN code 2933, and others call it the HTS code 2933. The shared base of the code is the same everywhere. Each country then adds its own extra digits for local use.
HS 2933 subheadings by ring structure
The easiest way to read this heading is by the ring in the molecule. Each ring type has its own small group of codes. Most groups end with a catch-all code for anything not named above it.
- Pyridine ring: 293331 for pyridine and its salts, 293332 for piperidine and its salts, 293333 to 293337 for named substances, and 293339 for the rest.
- Pyrimidine or piperazine ring: 293352 to 293359, which includes barbituric acid (malonylurea) and the named barbiturates.
- Everything else: 293391 for a named list of drug substances, 293392 for azinphos-methyl, and 293399 for compounds not named elsewhere.
HS code for melamine 293361, caprolactam 293371 and pyridine 293331
Most product-name searches end at one of a few codes. Melamine goes to 293361. Phenazone, also called antipyrin, goes to 293311.
Some codes name tightly controlled substances. One example is 293334, which covers other fentanyls and their derivatives. Check the local rules for these goods before you ship. Duty also depends on each national tariff, so use the HS code classifier to confirm the exact code and then check the tariff of your own country.
How to pick the right 2933 code, and how it differs from 2932 and 2934
Work through the steps in order. Stop when one fits.
That is the main difference between HS 2932 and 2933. Heading 2934 covers nucleic acids and other heterocyclic compounds, so it takes the rings that do not fit 2933 or 2932.
- Check the hetero-atoms. If the ring has nitrogen only, stay in 2933. If it has oxygen only, go to 2932.
- Find the ring type, such as pyrazole, pyridine or triazine.
- Look for the exact substance by name inside that ring group.
- Use the n.e.c. code, such as 293339 or 293399, only when no named code fits.
HS code 2933 import export data
EximDataX shows shipment-level import and export records from official customs sources. Coverage: 43 direct customs feeds plus 184 mirror-derived countries. Named buyers and named suppliers are available in 38 of the 43 direct markets. Most markets refresh weekly and some refresh daily. You can search by HS code to see who imports and exports a product, and book a free demo.
A shipment-level record is one line per consignment, not a yearly total. To see live records for this heading, open the import data and export data pages, or look up buyers and suppliers by code.
Nearby headings in Chapter 29
- 2927Diazo-, azo- or azoxy-compounds1 code
- 2928Organic derivatives of hydrazine or of hydroxylamine1 code
- 2929Nitrogen-function compounds, n.e.c. in chapter 292 codes
- 2930Organo-sulphur compounds8 codes
- 2931Other organo-inorganic compounds17 codes
- 2932Heterocyclic compounds with oxygen hetero-atom(s) only13 codes
- 2934Nucleic acids and their salts, whether or not chemically defined; other…6 codes
- 2935Sulphonamides6 codes
- 2936Provitamins, vitamins; natural or reproduced by synthesis (including natural…10 codes
- 2937Hormones, prostaglandins, thromboxanes and leukotrienes, natural or…9 codes
- 2938Glycosides, natural or reproduced by synthesis, and their salts, ethers…2 codes
- 2939Alkaloids; natural or reproduced by synthesis, and their salts, ethers…19 codes
Who ships under 2933?
EximDataX tracks the live import–export records filed under this heading and the 27 codes beneath it: named buyers, suppliers, quantities and values from official customs feeds.
Section VI: Products of the Chemical or Allied Industries, chapters 28–38.
HS Code 2933: common questions
What is the HS code for melamine?
Melamine is classed under 293361. Other triazine compounds go to 293369.
What is the HS code for caprolactam?
Caprolactam, listed as 6-hexanelactam, is classed under 293371. Other lactams use 293372 or 293379.
What is the HS code for pyridine and its salts?
Pyridine and its salts are under 293331. Piperidine and its salts have their own code, 293332.
What is the difference between HS 2932 and 2933?
Heading 2932 covers rings with oxygen as the only hetero-atom. Heading 2933 covers rings with nitrogen as the only hetero-atom.
Which code do I use for a compound that no 2933 code names?
Use 293339 if the ring is pyridine and no named code fits, or 293399 for other nitrogen heterocyclics. Try the named codes first, because the catch-all codes are the last choice.
Where can I find HS 2933 import export data with buyers and suppliers?
Open the import data and export data pages on EximDataX for shipment records. The buyer data and supplier data pages show who trades the goods.
See what your buyers are buying.Then decide.
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