USP Lithium Carbonate for Thyroid Function Tests
Pure USP-grade lithium carbonate used in laboratory reagents for thyroid hormone assays. This is a chemically defined lithium carbonate, classifiable under Chapter 28. It is not excluded by Chapter 28 notes and is not a diagnostic reagent of Chapter 38.
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:
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
• Document the USP grade and laboratory use on customs forms
• Ensure the product is not formulated into diagnostic kits, which would fall under Chapter 38
• Provide safety data sheets for laboratory chemicals
Related Products under Tariff item 2836.91.00
Anhydrous Lithium Carbonate Crystals
Anhydrous lithium carbonate crystals in pure crystalline form, used in specialty ceramics and enamel frits. This is a separate chemically defined compound of lithium carbonate, meeting the criteria of Chapter 28 Note 1(a). It is not excluded by Chapter 28 Note 3 as it is not a glass frit powder of heading 32.07.
Battery-Grade Lithium Carbonate
High-purity lithium carbonate optimized for lithium-ion battery cathode synthesis, with low impurity levels. This is a chemically defined lithium carbonate compound, classifiable under Chapter 28 as an inorganic carbonate. It is not excluded by Chapter 28 Note 3 and is not a finished preparation.
Battery-Grade Lithium Carbonate Li2CO3
Ultra-high purity lithium carbonate (≥99.5% Li2CO3) specifically for lithium battery precursor synthesis. This is a chemically defined lithium carbonate, classifiable under Chapter 28. It is not excluded by Chapter 28 notes and is not a finished battery material.
Battery-Grade USP Lithium Carbonate Precursor
USP-certified lithium carbonate used as a high-purity precursor in lithium-ion battery cathode production. This is a chemically defined lithium carbonate, classifiable under Chapter 28 as an inorganic carbonate. It is not a finished pharmaceutical and is not excluded by Chapter 28 notes.
High-Purity USP Lithium Carbonate Crystals
Crystalline USP lithium carbonate for precise pharmaceutical dosing applications. This is a chemically defined lithium carbonate, classifiable under Chapter 28. It is not a finished dosage form and is not excluded by Chapter 28 notes.
Lithium Carbonate Monohydrate
Lithium carbonate monohydrate (Li2CO3·H2O), a hydrated form of lithium carbonate, used in cement and polymer additives. Hydrated carbonates of inorganic bases are classifiable in Chapter 28 as they are separate chemically defined compounds. This product is not excluded by Chapter 28 notes.