Kelp Seaweed Ash
Ash produced from burning dried kelp seaweed, rich in potash and minerals, used in fertilizers. Falls under HTS 2621.90.00.00 as 'other slag and ash, including seaweed ash (kelp)', separate from municipal waste.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | +35.0% | 35% |
| 🇲🇽Mexico | Free | +10.0% | 10% |
| 🇨🇦Canada | Free | +10.0% | 10% |
| 🇩🇪Germany | Free | +10.0% | 10% |
| 🇯🇵Japan | Free | +10.0% | 10% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If purely unprocessed kelp ash without admixtures
Pure seaweed ash has a specific subheading 2621.10, while mixed falls to 'other' in 2621.90.
If refined into potash fertilizers
Processed into animal/vegetable fertilizers, it moves to Chapter 31.
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Import Tips & Compliance
• Label as 'seaweed ash' clearly to distinguish from 2621.10 if not pure kelp
• Test for iodine and alkali content; provide certificates for agricultural use
• Avoid bulk packaging that mimics industrial slag, leading to 2620 misclassification
Related Products under HTS 2621.90.00.00
Municipal Waste Incineration Ash
Ash and residues generated from the incineration of municipal solid waste, such as household garbage and non-hazardous urban refuse. Classified under HTS 2621.90.00.00 as it explicitly falls under 'ash and residues from the incineration of municipal waste', distinguishing it from industrial slag in heading 2620.
Landfill Leachate Treatment Residue Ash
Residues from incinerating municipal waste after leachate treatment in landfills, containing inert bottom ash. This product is under HTS 2621.90.00.00 due to its origin from municipal waste incineration, not industrial use.
Fly Ash from Household Waste Burning
Fine particulate fly ash captured from flue gases in municipal household waste incinerators. Under HTS 2621.90.00.00 as residues from municipal waste, not for metal recovery like 2620.
Processed Kelp Ash Fertilizer Base
Lightly processed ash from kelp incineration, used as a base for organic fertilizers high in trace minerals. Remains under HTS 2621.90.00.00 as unrefined seaweed ash.
Urban Biomass Waste Ash
Ash from incinerating urban biomass waste like yard trimmings and food scraps in municipal facilities. Classified HTS 2621.90.00.00 for other municipal waste residues.
Bottom Ash from Urban Incinerators
Coarse bottom ash residue collected at the base of municipal waste incineration furnaces. Classified in HTS 2621.90.00.00 for ash from municipal waste, excluding industrial applications in 2620.