Bulk Trimethoprim Base Crystals
Bulk trimethoprim base crystals are a pure free base form of trimethoprim, an antibiotic used in pharmaceutical compounding. Its structure contains a pyrimidine ring, classifying it under tariff item 2933.59.00 for heterocyclic compounds with nitrogen hetero-atoms. The product is a separate chemically defined organic compound, meeting Chapter 29 criteria.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as a bulk medicament for retail sale
Bulk medicaments not put up in measured doses may fall under Chapter 30.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the product is in bulk crystalline form, not formulated for retail sale, to qualify under Chapter 29
• Provide a certificate of analysis confirming the pyrimidine ring and free base form
• Verify if the product requires a Drug Establishment Licence (DEL) for pharmaceutical use
Related Products under Tariff item 2933.59.00
Atrazine
Atrazine is a chlorinated triazine herbicide containing a pyrimidine ring structure, used primarily for pre-emergent control of broadleaf and grassy weeds in crops like corn and sorghum. It is a separate chemically defined organic compound with nitrogen hetero-atoms, falling under tariff item 2933.59.00 as 'Other' heterocyclic compounds.
Atrazine Herbicide
Atrazine is a chlorinated triazine herbicide containing a heterocyclic nitrogen ring structure, used primarily for pre-emergent control of broadleaf and grassy weeds in corn and sorghum crops. It is a separate chemically defined organic compound with a pyrimidine ring in its structure, falling under tariff item 2933.59.00 as 'Other' heterocyclic compounds with nitrogen hetero-atom(s) only.
Bromacil
Bromacil is a uracil herbicide with a pyrimidine ring structure, controlling weeds in citrus groves and non-crop areas via soil persistence. It is a separate chemically defined organic compound with nitrogen hetero-atoms, qualifying under tariff item 2933.59.00 as 'Other' heterocyclic compounds.
Bromacil Brush Killer
Bromacil is a uracil herbicide with a pyrimidine ring structure, controlling tough brush and weeds in non-crop areas and citrus groves. It is a separate chemically defined organic compound with a nitrogen hetero-atom ring, qualifying under tariff item 2933.59.00 as 'Other' heterocyclic compounds.
Brompheniramine Maleate
Brompheniramine maleate is an antihistamine used to treat allergic rhinitis and nausea. This aromatic propylamine derivative with pyrimidine affinity is a chemically pure drug, classified under tariff item 2933.59.00 for heterocyclic compounds with nitrogen hetero-atoms.
Buclizine Hydrochloride
Buclizine hydrochloride is a piperazine antihistamine used to treat nausea, vomiting, and motion sickness. Its aromatic heterocyclic structure containing a piperazine ring qualifies it under tariff item 2933.59.00.