Potassium Tetraborate
Potassium tetraborate is an inorganic salt used as a boron source in welding fluxes and ceramics. It is an 'other borate' because it is a metal borate other than sodium borate, and it is chemically defined per Chapter 28.
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 product is a peroxoborate (perborate)
Peroxoborates are classified separately.
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
• Confirm the product is not a peroxoborate, which would be classified under a different subheading
• Provide the CAS number and purity certificate to expedite customs clearance
• Ensure the product is not put up for retail sale as a consumer good, which could affect classification
Related Products under Tariff item 2840.20.00
Ammonium Pentaborate Solution
Ammonium pentaborate solution (20-40% concentration) is a chemically defined inorganic compound used as a fire retardant and boron supplement in agriculture. It qualifies as an 'other borate' under this tariff item because it is not a sodium borate and meets the Chapter 28 criteria for separate chemically defined compounds in solution.
Barium Borate
Barium borate is a chemically defined inorganic compound used in optical glass and X-ray screens for its refractive index control. It is an 'other borate' because it is not a sodium borate and falls under this tariff item as a metal borate salt.
Cadmium Borate
Cadmium borate is a chemically defined metal borate used in phosphors and specialty pigments. It is classified as an 'other borate' under this tariff item, but its cadmium content triggers additional regulatory scrutiny.
Calcium Borate Precipitate
Calcium borate precipitate is a fine particulate form of calcium borate used in specialty ceramics and as a boron supplement. It is an 'other borate' because it is a metal borate other than sodium borate, and it is not excluded by Chapter 31 notes.
Disodium Tetraborate Anhydrous
Disodium tetraborate anhydrous is a dehydrated form of borax, chemically defined as a sodium borate. It is classified under this tariff item as an 'other borate' because it is not the refined borax form covered by the sibling subheading, and it meets Chapter 28 requirements.
Lead Borate
Lead borate is a chemically defined metal borate used in glass-to-metal seals and radiation shielding glass. It is an 'other borate' under this tariff item because it is not a sodium borate and meets Chapter 28 criteria for inorganic compounds.