What is HS-4 2508 used for?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
HS-4 · Heading
2508 — Clays; (not including expanded clays of heading no. 6806), andalusite kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earth
Chapter 25: Salt; sulphur; earths and stone
Plain-language overview
Use HS-4 2508 when importing clays, such as bentonite or fireclay, whether calcined or not. For example, if you're bringing in a shipment of bentonite clay for use in drilling mud, this heading applies.
To differentiate between the HS-6 lines, consider the specific type of clay. For instance, HS-6 250810 covers bentonite, while HS-6 250830 is for fireclay. If your product is a calcined fireclay, you would classify it under 250830.
If your clay does not fit neatly into the bentonite or fireclay categories, you might look at HS-6 250840, which includes other clays not specifically mentioned elsewhere. This could apply to a unique clay type you’re importing that doesn’t have its own classification.
For specialized clays like andalusite or kyanite, use HS-6 250850. If your shipment consists of mullite, then HS-6 250860 is the correct choice. Always ensure to verify the specific properties of your clay to select the appropriate line.
Keywords & topics
Useful terms traders and brokers use for this HS-4 heading.
bentonite clay · fireclay · calcined clays · mullite · andalusite · kyanite · sillimanite · chamotte · dinas earth · HS-4 2508 · HS-6 classifications · importing clays · clay types · refractory materials · industrial clays
Examples
Drawn from the official tariff wording for this HS-4 heading. Always confirm against your published schedule and legal notes.
- Bentonite clay for drilling applications
- Fireclay used in refractory materials
- Mullite for ceramic manufacturing
- Andalusite for high-temperature applications
- Chamotte used in kiln linings
- Calcined fireclay for construction
- Specialty clays for industrial processes
Common questions
Frequent classification questions with short practical guidance.
How to classify bentonite clay?
Write down material, use, and product form first, then compare nearby lines before you lock the code.
What are the differences between fireclay and other clays?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
Is calcined clay covered under HS-4 2508?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
What is the correct HS-6 code for mullite?
Match the product to the legal wording, then verify the final pick in your country tariff schedule before filing.
How to import and classify chamotte earth?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
What types of clays are included in HS-4 2508?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
Related topics
Common real-world topics that come up during code comparison.
how to classify bentonite clay for import
Check the exact product specs and destination-country tariff notes before finalizing the code.
differences between fireclay and andalusite
Compare adjacent HS lines and pick the one that matches material, function, and product form most closely.
importing calcined clays under HS-4 2508
Check the exact product specs and destination-country tariff notes before finalizing the code.
what is the HS-6 code for chamotte earth
Use this topic to narrow your shortlist, then validate the final code against legal wording.
understanding clay classifications in HS-4
Use this topic to narrow your shortlist, then validate the final code against legal wording.
how to determine the right HS-6 for clays
Use this topic to narrow your shortlist, then validate the final code against legal wording.
import regulations for refractory clays
Check the exact product specs and destination-country tariff notes before finalizing the code.
what types of clays are included in HS-4 2508
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 clays are covered under HS-4 2508?
- HS-4 2508 covers various clays including bentonite, fireclay, mullite, and andalusite, among others.
- How do I know if my clay is calcined?
- Calcined clay has been heated to remove moisture and improve properties. Check your supplier's specifications for details.
- Can I use HS-6 250840 for unique clay types?
- Yes, HS-6 250840 is for clays not specifically classified elsewhere in heading 2508.
- What is the significance of the 'n.e.c.' in HS-6 250840?
- 'N.e.c.' stands for 'not elsewhere classified', meaning it includes clays that don’t fit into other specific categories.
- Is there a specific code for chamotte?
- Yes, chamotte is classified under HS-6 250870.
- What should I do if I’m unsure about the classification?
- Consult with a customs broker or refer to customs rulings for guidance on proper classification.
- Are there any specific import regulations for clays?
- Yes, check with your local customs authority for any specific import regulations or restrictions on clays.
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Heading-browse mode uses HS-6 250800 (first line of this block).
HS-6 subheadings (6)
- 250810Clays (excluding expanded clays of heading no. 6806); bentonite, whether or not calcined
- 250830Clays (excluding expanded clays of heading no. 6806); fireclay, whether or not calcined
- 250840Clays (excluding expanded clays of heading no. 6806); n.e.c. in heading no. 2508, whether or not calcined
- 250850Clays (excluding expanded clays of heading no. 6806); andalusite, kyanite and sillimanite, whether or not calcined
- 250860Clays (excluding expanded clays of heading no. 6806); mullite
- 250870Clays (excluding expanded clays of heading no. 6806); chamotte or dinas earths