Harmonized System Code Classification

25
Description: Salt, sulfur, limestone, cement, fertilizers, mineral fuels, mineral oils and their distillation products, bitumen, wax, etc.

2508
Description: Other clays (excluding expanded clays under heading 6806), andalusite, sillimanite, and kyanite, whether or not calcined; mullite; refractory clays or siliceous earth.

2508.10
Description: Other clays (excluding expanded clays under heading 6806), andalusite, sillimanite, and kyanite, whether or not calcined; mullite; refractory clays or siliceous earth.

2508100000
Description: Other clays (excluding expanded clays under heading 6806), andalusite, sillimanite, and kyanite, whether or not calcined; mullite; refractory clays or siliceous earth. This code includes andalusite, sillimanite, and kyanite, whether or not calcined, mullite, refractory clays or siliceous earth, but excludes expanded clays under heading 6806.

Examples of products:
- Andalusite
- Sillimanite
- Kyanite
- Mullite
- Refractory clay
- Siliceous earth