Heading 2508
HTS code 2508 — Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths
- Chapter
- 25 — Salt, stone and cement
- Tariff lines
- 8
- General duty
- Duty-free under the general rate
Tariff lines under heading 2508
Full 10-digit codes with their general (MFN) duty rates. The correct line depends on the product's material, construction, and use.
| HTS code | Description | General rate | Unit |
|---|---|---|---|
| 2508.10.0000 | Bentonite (Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths) | Free | t |
| 2508.30.0000 | Fire-clay (Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths) | Free | t |
| 2508.40.0110 | Common blue clay and other ball clays (Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths > Other clays) | Free | t |
| 2508.40.0120 | Decolorizing earths and fuller's earth (Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths > Other clays) | Free | t |
| 2508.40.0150 | Other (Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths > Other clays) | Free | t |
| 2508.50.0000 | Andalusite, kyanite and sillimanite (Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths) | Free | t |
| 2508.60.0000 | Mullite (Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths) | Free | t |
| 2508.70.0000 | Chamotte or dinas earth (Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths) | Free | t |
Documents required to import under 2508
Customs paperwork typically required to import these goods into the United States. Conditional items depend on shipment value, transport mode, or origin.
- Commercial InvoiceRequired
- Packing ListRequired
- Bill of Lading / Airway BillRequired
- CBP Entry Summary (7501)Required
Prepared and filed by your customs broker
- CBP Entry / Release (3461)Required
Prepared and filed by your customs broker
- Customs Bond (CBP 301)Conditional
Required for formal entries — generally shipments valued over $2,500
Single-entry or continuous bond, obtained through your broker or a surety
- Importer Security Filing (ISF "10+2")Conditional
Required for ocean freight only
Filed electronically at least 24 hours before loading at the foreign port
- Importer ID Input Record (CBP 5106)Conditional
Required to establish or update your importer-of-record number with CBP
One-time setup for a new importer; not filed per shipment
- Entry Manifest (CBP 7533)Conditional
Alternative to the 3461 for informal, low-value, or contiguous-country entries
Common questions
- What is HTS code 2508?
- HTS heading 2508 covers other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths. It sits in Chapter 25 (salt, stone and cement) of the US Harmonized Tariff Schedule and contains 8 tariff lines.
- What is the duty rate for HTS 2508?
- Duty-free under the general rate. The general rate applies to most-favoured-nation trading partners; goods from countries with a free trade agreement may qualify for a reduced or duty-free special rate.
- How many digits does a full HTS code have?
- US import entries require the full 10-digit HTS code. Heading 2508 is the first four digits — the remaining six narrow it down to the specific product, which is what determines the duty rate you actually pay.
Related headings in Chapter 25
- 2501Salt (including table salt and denatured salt) and pure sodium chloride, whether or not in aqueous solution or containing added anti-caking or free-flowing agents; sea water
- 2502Unroasted iron pyrites
- 2503Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur
- 2504Natural graphite
- 2505Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26
- 2506Quartz (other than natural sands); quartzite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape
- 2507Kaolin and other kaolinic clays, whether or not calcined
- 2509Chalk