Methyprylon USP Reference Standard
> Methyprylon USP Reference Standard is a certified reference standard of the piperidinedione sedative-hypnotic methyprylon, used for quality control and analytical testing in pharmaceutical laboratories. It is a separate chemically defined compound, specifically named under tariff item 2933.72.00, and meets the criteria of Chapter 29 Note 1(a). The product is a lactam with a nitrogen hetero-atom ring.
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 the reference standard is not specifically methyprylon
Other heterocyclic compounds with nitrogen hetero-atoms only.
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
• > Include the USP certificate of analysis to confirm the product's identity and grade
• If the standard is for laboratory use only, state this clearly on the invoice to avoid misclassification as a pharmaceutical
• Ensure the product is packaged in appropriate laboratory quantities, not for retail sale
Related Products under Tariff item 2933.72.00
Clobazam Anhydrous Technical Grade
> Clobazam Anhydrous Technical Grade is a technical-grade anhydrous form of the pharmaceutical compound clobazam, used as an intermediate in industrial pharmaceutical synthesis. It is a separate chemically defined organic compound containing a nitrogen hetero-atom ring, meeting the criteria of Chapter 29 Note 1(a). As a lactam, it is specifically named under tariff item 2933.72.00.
Clobazam API Micronized
> Clobazam API Micronized is a micronized active pharmaceutical ingredient of clobazam, a 1,5-benzodiazepine derivative, processed to improve bioavailability in tablet formulations. It is a pure, chemically defined heterocyclic compound with a nitrogen hetero-atom ring and a lactam structure, directly named under tariff item 2933.72.00. The micronization does not alter its chemical identity.
Clobazam USP Powder
> Clobazam USP Powder is a pharmaceutical-grade clobazam powder that meets United States Pharmacopeia standards, used as an active ingredient in drug formulations. It is a 1,5-benzodiazepine derivative and a lactam, classified as a separate chemically defined heterocyclic compound with nitrogen hetero-atoms only. This product is specifically named under tariff item 2933.72.00.
Clobazam Working Standard
> Clobazam Working Standard is a high-purity reference material used for routine HPLC assay calibration and stability testing in quality control laboratories. It is a separate chemically defined compound, specifically clobazam, containing impurities only as permitted by Chapter 29 Note 1(a). As a lactam, it falls under tariff item 2933.72.00.
Methyprylon Synthesis Intermediate
> Methyprylon Synthesis Intermediate is a high-purity chemical intermediate used in research synthesis of piperidinedione analogs. It is a separate chemically defined organic compound with a nitrogen hetero-atom ring, specifically a lactam, and is directly named under tariff item 2933.72.00. The product meets Chapter 29 Note 1(a) criteria.