What are natural borates used for?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
HS-4 · Heading
2528 — Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85 % of H3BO3 calculated on the dry weight
Chapter 25: Salt; sulphur; earths and stone
Plain-language overview
Use HS-4 2528 when importing natural borates or their concentrates, such as borax or kernite, which are often used in glass manufacturing or as fertilizers. For example, if you're shipping a container of borax powder, this code will likely apply.
When deciding between HS-6 lines, note that HS-252800 encompasses all natural borates and concentrates, including those that may be calcined. If your product is a natural borate not separated from brine and contains less than 85% H3BO3, this is the correct classification.
It's important to distinguish between natural borates and other forms. If your shipment involves borates derived from brine, they fall outside the scope of HS-4 2528. Ensure your product meets the criteria to avoid misclassification and potential delays.
Keywords & topics
Useful terms traders and brokers use for this HS-4 heading.
natural borates · borax classification · boron compounds · boric acid shipping · calcined borates · borates for agriculture · borate concentrates · HS-4 2528 · importing borates · boron mineral products
Examples
Drawn from the official tariff wording for this HS-4 heading. Always confirm against your published schedule and legal notes.
- Borax (sodium borate) used in glass production
- Kernite, a natural borate mineral
- Natural boric acid for agricultural use
- Concentrated borates for chemical manufacturing
- Calcined borates for industrial applications
Common questions
Frequent classification questions with short practical guidance.
How to classify borax for import?
Write down material, use, and product form first, then compare nearby lines before you lock the code.
Is boric acid under HS-2528?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
What is the difference between borates and boric acid?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
Are calcined borates included in HS-4 2528?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
How to determine the correct HS code for boron products?
Match the product to the legal wording, then verify the final pick in your country tariff schedule before filing.
Related topics
Common real-world topics that come up during code comparison.
how to import natural borates
Check the exact product specs and destination-country tariff notes before finalizing the code.
classification of borax under HS codes
Use this topic to narrow your shortlist, then validate the final code against legal wording.
shipping boric acid with HS-4 2528
Use this topic to narrow your shortlist, then validate the final code against legal wording.
understanding borate concentrates for trade
Use this topic to narrow your shortlist, then validate the final code against legal wording.
differences between natural and synthetic borates
Compare adjacent HS lines and pick the one that matches material, function, and product form most closely.
requirements for importing boron compounds
Check the exact product specs and destination-country tariff notes before finalizing the code.
using HS-4 2528 for boron product classification
Use this topic to narrow your shortlist, then validate the final code against legal wording.
what to include in borate shipping documents
Use this topic to narrow your shortlist, then validate the final code against legal wording.
Questions & answers
For orientation only—the binding text is your national tariff and the WCO nomenclature your country uses.
- What types of products fall under HS-4 2528?
- HS-4 2528 covers natural borates and their concentrates, including products like borax and kernite.
- Can I classify boric acid under HS-4 2528?
- Yes, as long as the natural boric acid contains not more than 85% H3BO3 calculated on the dry weight.
- Are calcined borates included in this HS code?
- Yes, calcined borates are included under HS-252800.
- What should I do if my product is derived from brine?
- If your product is derived from brine, it does not fall under HS-4 2528 and should be classified separately.
- How do I ensure proper classification of my borate shipment?
- Review the product specifications and ensure they meet the criteria outlined for HS-4 2528 before shipping.
Continue classification
Parent context
Nearby siblings
Next best action
Pick one of these actions to move from reading to a defensible classification decision.
Browse this heading in the lookup
Heading-browse mode uses HS-6 252800 (first line of this block).