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Ribonolactone

Ribonolactone, a five-membered furanose lactone from ribose, contains oxygen heteroatom only and is classified under HTS 2932.20.50. Used in nucleotide synthesis.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China3.7%+12.5%16.2%
🇲🇽Mexico3.7%+10.0%13.7%
🇨🇦Canada3.7%+10.0%13.7%
🇩🇪GermanyFree+10.0%10%
🇯🇵JapanFree+12.5%12.5%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

2934.99.90Higher: 19% vs 16.2%

If phosphorylated or containing nitrogen bases

Nucleoside derivatives shift to nucleic acid headings.

2940.00.60Higher: 43.3% vs 16.2%

If sugar derivatives with specific enzyme substrate claims

Enzyme substrate classification supersedes lactone structure.

Not sure which classification is right?

The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.

Import Tips & Compliance

• Anhydrous grade requires <0.1% water content certification

• Nucleic acid synthesis purity standards exceed general chemical specs

• Cold chain (-20°C) mandatory for activity preservation