# 2933 — Heterocyclic compounds with nitrogen hetero-atom(s) only

HS code 2933 classifies Heterocyclic compounds with nitrogen hetero-atom(s) only. It belongs to Chapter 29 (Organic chemicals) of Section VI (Products of the chemical or allied industries) of the Harmonized System.

> Section VI · Products of the chemical or allied industries
> Chapter 29 · Organic chemicals

**HS code:** `2933`

## Description

Heterocyclic compounds with nitrogen hetero-atom(s) only

## Subheadings

- `293311` — Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure — Phenazone (antipyrin) and its derivatives
- `293319` — Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure — Other
- `293321` — Compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure — Hydantoin and its derivatives
- `293329` — Compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure — Other
- `293331` — Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure — Pyridine and its salts
- `293332` — Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure — Piperidine and its salts
- `293333` — 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), 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
- `293334` — Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure — Other fentanyls and their derivatives
- `293335` — Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure — 3-Quinuclidinol
- `293336` — Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure — 4-Anilino-N-phenethylpiperidine (ANPP)
- `293337` — Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure — N-Phenethyl-4-piperidone (NPP)
- `293339` — Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure — Other
- `293341` — Compounds containing in the structure a quinoline or isoquinoline ring-system (whether or not hydrogenated), not further fused — Levorphanol (INN) and its salts
- `293349` — Compounds containing in the structure a quinoline or isoquinoline ring-system (whether or not hydrogenated), not further fused — Other
- `293352` — Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure — Malonylurea (barbituric acid) and its salts
- `293353` — Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure — 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` — Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure — Other derivatives of malonylurea (barbituric acid); salts thereof
- `293355` — 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` — Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure — Other
- `293361` — Compounds containing an unfused triazine ring (whether or not hydrogenated) in the structure — Melamine
- `293369` — Compounds containing an unfused triazine ring (whether or not hydrogenated) in the structure — Other
- `293371` — Lactams — 6-Hexanelactam (epsilon-caprolactam)
- `293372` — Lactams — Clobazam (INN) and methyprylon (INN)
- `293379` — Lactams — Other lactams
- `293391` — Other — Alprazolam (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
- `293392` — Other — Azinphos-methyl (ISO)
- `293399` — Other — Other

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Source: https://eximagent.ai/hscode/29/2933
Last updated: 2026-06-03
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