4-Methylumbelliferone (CAS 90-33-5)
4-Methylumbelliferone (4-MU) is a methylcoumarin derivative with a lactone ring structure, making it classifiable under tariff item 2932.20.00 as a lactone. It is widely used as a fluorogenic substrate in biochemical assays and as a laser dye.
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 |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is not specifically a lactone but another heterocyclic compound with oxygen hetero-atoms
Other oxygen-containing heterocyclic compounds fall under this alternative.
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 a separate chemically defined organic compound per Chapter 29 Note 1(a)
• Declare the CAS number (90-33-5) on the commercial invoice to facilitate CBSA classification
• Verify whether the product requires a controlled substances permit if used in research
Related Products under Tariff item 2932.20.00
6-Ethylcoumarin (CAS 17912-17-1)
6-Ethylcoumarin is a substituted coumarin with a lactone ring, qualifying under tariff item 2932.20.00. It is used in advanced fragrance formulations for its powerful, long-lasting scent.
6-Methylcoumarin (CAS 92-48-8)
6-Methylcoumarin is a methyl derivative of coumarin with a lactone structure, classifiable under tariff item 2932.20.00. It serves as a key fragrance fixative in high-end perfumes and flavoring agents.
7-Methylcoumarin (CAS 541-59-3)
7-Methylcoumarin, also known as herniarin, is a coumarin derivative with a lactone ring, qualifying under tariff item 2932.20.00. It functions as a UV absorber in cosmetics and a flavor enhancer.
Aflatoxin B1 Standard
Aflatoxin B1 is a highly toxic aromatic lactone mycotoxin used as an analytical standard for food safety testing, classifiable under tariff item 2932.20.00 as a lactone compound.
Brodifacoum Pesticide Concentrate
Brodifacoum is a second-generation 4-hydroxycoumarin anticoagulant rodenticide with an aromatic lactone ring structure, classifiable under tariff item 2932.20.00. It is a pure chemical compound used as a pesticide active ingredient.
Coumarin-based Rodenticide
Coumarin-based rodenticide is a synthetic aromatic lactone derivative of coumarin used as an anticoagulant pesticide for rodent control, classifiable under tariff item 2932.20.00 as a pure chemical compound.