Heterocyclic compounds with nitrogen hetero-atom(s) only
HS heading 29.33 covers Heterocyclic compounds with nitrogen hetero-atom(s) only. Within Chapter 29 it splits into 27 six-digit subheadings, each carrying its own customs duty line.
- India exports 2024
- $5.31B
- Share of Chapter 29
- 25.6%
- Rank in its chapter
- #1 of 42
Source: UN Comtrade — India's reported merchandise exports to the world, 2024.
Sourcing this category from India
HS 29.33 covers Heterocyclic compounds with nitrogen hetero-atom(s) only. At the six-digit line it breaks down further — starting with heterocyclic compounds — into 27 duty lines shown below. Organic chemicals are a major Indian export, anchored by the country's strength in bulk drugs and intermediates. India exported $5.31B under this code worldwide in 2024, about 25.6% of all Chapter 29 exports, ranking #1 of 42 lines in its chapter (UN Comtrade).
How to read this code
29.33 is the four-digit HS heading for heterocyclic compounds with nitrogen hetero-atom(s. To clear customs your destination country extends it to a full 8–10 digit code and assigns the duty rate. India's preferential trade agreements (UAE CEPA, Australia ECTA, and others) can reduce or zero out that duty on many chemicals & allied industries lines — check our import guides for your market.
Subheadings under HS 29.33
The Harmonised System breaks Heterocyclic compounds with nitrogen hetero-atom(s) only into these 27 subheadings. Drill down to the exact classification for your goods.
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
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
Heterocyclic compounds; with nitrogen hetero-atom(s) only, containing an unfused imidazole ring (whether or not hydrogenated) in the structure, hydantoin and its derivatives
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
Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, pyridine and its salts
Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, piperidine and its salts
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)
Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, other fentanyls and their derivatives
Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, 3-quinuclidinol
Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, 4-anilino-N-phenethylpiperidine (ANPP)
Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, N-phenethyl-4-piperdone (NPP)
Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, n.e.c. in 2933.3
Heterocyclic compounds; containing a quinoline or isoquinoline ring-system (whether or not hydrogenated) in the structure, not further fused, levorphanol (INN) and its salts
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
Heterocyclic compounds; containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, malonylurea (barbituric acid) and its salts
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
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
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
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
Heterocyclic compounds; containing an unfused triazine ring (whether or not hydrogenated) in the structure, melamine
Heterocyclic compounds; containing an unfused triazine ring (whether or not hydrogenated) in the structure, others excluding melamine
Heterocyclic compounds; lactams; 6-hexanelactam (epsilon-caprolactam)
Heterocyclic compounds; lactams; clobazam (INN) and methyprylon (INN)
Heterocyclic compounds; lactams; other than 6-hexanelactam (epsilon caprolactam) and clobazam (INN) and methyprylon (INN)
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)
Heterocyclic compounds; azinphos-methyl (ISO)
Heterocyclic compounds; n.e.c. in headings no. 2933
Top destinations for Chapter 29 exports
India's largest buyers of goods in this HS chapter in 2024, ranked by export value.
Chapter-level destination mix — your specific HS line may skew differently. Source: UN Comtrade, 2024.
More codes in Organic chemicals
Jump to the other headings classified under 29 — hover a code for its description.
Working out import duty for HS 29.33 into your market? See full duty context and India-vs-rivals comparisons in our India comparison guides and export resource hub.
Indian exporters in this category
Established export houses with relevant HS focus. Listings are compiled from public records — run your own due diligence.
Browse the full exporter directory →Source goods under HS 29.33 directly from India.
We handle sourcing, QC, freight and documentation end-to-end. You stay focused on growing the brand.