--- title: "2933.99 – Heterocyclic compounds with… › Other: Canada tariff & duty rates" description: "Every Canadian tariff classification under HS 2933.99: Heterocyclic compounds with nitrogen hetero-atom(s) only › Other. CBSA duty rates for each code." canonical: "https://www.adhocs.ca/hs-codes/2933.99" --- # 2933.99 Heterocyclic compounds with nitrogen hetero-atom(s) only › Other Up: [HS codes](https://www.adhocs.ca/hs-codes) › [Chapter 29](https://www.adhocs.ca/hs-codes/29) › [2933](https://www.adhocs.ca/hs-codes/2933) 4 classifications. Each 10-digit code links to its page, with its rate under every tariff treatment. - [2933.99.00.10](https://www.adhocs.ca/hs-codes/2933.99.00.10) Amino-acids, for use in the manufacture of mixtures of amino-acids or of mixtures of amino-acids and protein hydrolysates (whether or not containing added minerals, vitamins, fats or carbohydrates), specially compounded for persons afflicted with amino acid disorders; Chemical antioxidants, hardeners, inhibitors, restrainers, sensitizers and stabilizers, for use in the manufacture of photographic emulsions; For use in the manufacture of animal or poultry feeds, glues or adhesives, optical fibres or optical fibre bundles or cables, typewriter or similar ribbons, polymers in primary forms or profile shapes or sheets of plastics; Having a benzenoid structure, for use as a starting material in the manufacture of synthetic organic dyes or pigment dyestuffs; L-Tryptophan, for use in the manufacture of pharmaceutical products - [2933.99.00.20](https://www.adhocs.ca/hs-codes/2933.99.00.20) Compounds containing an unfused five-membered hetero-atom ring in the structure - [2933.99.00.30](https://www.adhocs.ca/hs-codes/2933.99.00.30) Compounds having a tricyclic ring system - [2933.99.00.90](https://www.adhocs.ca/hs-codes/2933.99.00.90) Other ## Other subheadings in this heading - Next: [2933.11](https://www.adhocs.ca/hs-codes/2933.11.00.00) Phenazone (antipyrin) and its derivatives [Source: CBSA Customs Tariff](https://www.cbsa-asfc.gc.ca/trade-commerce/tariff-tarif/menu-eng.html).