HS Code 2621
Miscellaneous Slag, Ash and Seaweed Ash
HS code 2621 covers miscellaneous slag and ash, including seaweed ash and residues from municipal waste incineration, excluding metal-bearing industrial residue
4-digit Section VBulk
HS Code 2621 — Miscellaneous Slag, Ash and Seaweed Ash
This category covers various types of ash and slag not elsewhere specified, including seaweed ash (kelp) and residues from municipal waste incineration. It is often used in fertiliser production or as construction filler.
What's included
- Kelp ash
- Municipal waste incineration bottom ash (IBA)
- Fly ash from coal power plants
- Potassium-rich plant ash
What's excluded
- Potassic fertilisers → use
3104(Pure or processed fertilisers fall under Chapter 31.)
Common examples
- Incinerator bottom ash for road base
- Pulverised fuel ash (PFA)
- Seaweed ash for iodine extraction
- Coal fly ash for cement blending
Frequently asked questions
Is coal fly ash classified here?
Yes, fly ash resulting from the combustion of coal in power plants is classified under HS 2621.
Trade & shipping notes
- Typical duty range: 0% - 3%
- Documentation: Certificates of analysis are often required to prove metal content levels are low enough for this heading.
- Typical shipping mode: Bulk
- Top exporters: China, India, USA, Poland
- Top importers: Vietnam, Thailand, Bangladesh, Netherlands
Related HS codes
Key takeaway
The catch-all code for non-metalliferous ash, commonly used in the construction and agricultural sectors.
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