--- title: "2933 – Heterocyclic compounds with nitrogen…: Canada tariff & duty rates" description: "Every Canadian tariff classification under HS 2933: Heterocyclic compounds with nitrogen hetero-atom(s) only. CBSA duty rates for each code." canonical: "https://www.adhocs.ca/hs-codes/2933" --- # 2933 Heterocyclic compounds with nitrogen hetero-atom(s) only. Up: [HS codes](https://www.adhocs.ca/hs-codes) › [Chapter 29](https://www.adhocs.ca/hs-codes/29) 27 subheadings. Each subheading links to its page, which lists its 10-digit codes, or to its only 10-digit code. ## Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure - [2933.11.00.00](https://www.adhocs.ca/hs-codes/2933.11.00.00) Phenazone (antipyrin) and its derivatives - [2933.19.00.00](https://www.adhocs.ca/hs-codes/2933.19.00.00) Other ## Compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure - [2933.21.00.00](https://www.adhocs.ca/hs-codes/2933.21.00.00) Hydantoin and its derivatives - [2933.29.00.00](https://www.adhocs.ca/hs-codes/2933.29.00.00) Other ## Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure - [2933.31.00.00](https://www.adhocs.ca/hs-codes/2933.31.00.00) Pyridine and its salts - [2933.32.00.00](https://www.adhocs.ca/hs-codes/2933.32.00.00) Piperidine and its salts - [2933.33.00.00](https://www.adhocs.ca/hs-codes/2933.33.00.00) 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 - [2933.34.00.00](https://www.adhocs.ca/hs-codes/2933.34.00.00) Other fentanyls and their derivatives - [2933.35.00.00](https://www.adhocs.ca/hs-codes/2933.35.00.00) 3-Quinuclidinol - [2933.36.00.00](https://www.adhocs.ca/hs-codes/2933.36.00.00) 4-Anilino-N-phenethylpiperidine (ANPP) - [2933.37.00.00](https://www.adhocs.ca/hs-codes/2933.37.00.00) N-Phenethyl-4-piperidone (NPP) - [2933.39](https://www.adhocs.ca/hs-codes/2933.39) Other ## Compounds containing in the structure a quinoline or isoquinoline ring-system (whether or not hydrogenated), not further fused - [2933.41.00.00](https://www.adhocs.ca/hs-codes/2933.41.00.00) Levorphanol (INN) and its salts - [2933.49.00.00](https://www.adhocs.ca/hs-codes/2933.49.00.00) Other ## Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure - [2933.52.00.00](https://www.adhocs.ca/hs-codes/2933.52.00.00) Malonylurea (barbituric acid) and its salts - [2933.53.00.00](https://www.adhocs.ca/hs-codes/2933.53.00.00) 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 - [2933.54.00.00](https://www.adhocs.ca/hs-codes/2933.54.00.00) Other derivatives of malonylurea (barbituric acid); salts thereof - [2933.55.00.00](https://www.adhocs.ca/hs-codes/2933.55.00.00) Loprazolam (INN), mecloqualone (INN), methaqualone (INN) and zipeprol (INN); salts thereof - [2933.59](https://www.adhocs.ca/hs-codes/2933.59) Other ## Compounds containing an unfused triazine ring (whether or not hydrogenated) in the structure - [2933.61.00.00](https://www.adhocs.ca/hs-codes/2933.61.00.00) Melamine - [2933.69](https://www.adhocs.ca/hs-codes/2933.69) Other ## Lactams - [2933.71](https://www.adhocs.ca/hs-codes/2933.71) 6-Hexanelactam (epsilon-caprolactam) - [2933.72.00.00](https://www.adhocs.ca/hs-codes/2933.72.00.00) Clobazam (INN) and methyprylon (INN) - [2933.79.00.00](https://www.adhocs.ca/hs-codes/2933.79.00.00) Other lactams ## Other - [2933.91.00.00](https://www.adhocs.ca/hs-codes/2933.91.00.00) 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 - [2933.92.00.00](https://www.adhocs.ca/hs-codes/2933.92.00.00) Azinphos-methyl (ISO) - [2933.99](https://www.adhocs.ca/hs-codes/2933.99) Other ## Other headings in this chapter - Previous: [2932](https://www.adhocs.ca/hs-codes/2932) Heterocyclic compounds with oxygen hetero-atom(s) only. - Next: [2934](https://www.adhocs.ca/hs-codes/2934) Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds. [Source: CBSA Customs Tariff](https://www.cbsa-asfc.gc.ca/trade-commerce/tariff-tarif/menu-eng.html).