Oyster Shell Waste
Crushed waste shells from molluscs like oysters, unfit for food, used in lime production or abrasives. Fits HTS 0511.91.00.90 as other mollusc products.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If calcined into lime
Heat treatment for lime production moves to Chapter 25.
If ground into abrasives
Processed into polished articles uses Chapter 68.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Invoice as 'shell waste unfit for consumption' to distinguish from food shells
• Test for pollutants from polluted waters
• Bulk shipping preferred over retail packs
Related Products under HTS 0511.91.00.90
Dried Fish Swim Bladders
Dried swim bladders (also known as isinglass) extracted from fish like sturgeon or cod, unfit for human consumption due to processing. Classified under HTS 0511.91.00.90 as other products of fish not elsewhere specified, primarily used in industrial applications like glue making or clarification.
Fish Bone Meal
Ground meal from fish bones and waste, unfit for human consumption, used in fertilizers or animal feed supplements. Falls under HTS 0511.91.00.90 as other fish products not specified elsewhere in aquatic invertebrate or dead animal categories.
Dried Squid Glands
Extracted and dried ink glands from squid, unfit for human food use, often for industrial dyes or inks. Classified in HTS 0511.91.00.90 as other products of molluscs or crustaceans not covered elsewhere.
Shrimp Shell Chitin Powder
Powdered chitin derived from crustacean shells like shrimp, pre-processed but unfit for consumption, used in supplements or materials. Under HTS 0511.91.00.90 for other crustacean products.
Dead Jellyfish Carcasses
Whole or partial dead jellyfish unfit for human consumption, sourced from Chapter 3 dead animals, used in research or extraction. HTS 0511.91.00.90 covers such other aquatic invertebrate products.
Dried Sea Urchin Spines
Dried spines from sea urchins, byproduct unfit for human consumption, used in crafts or calcium sources. Classified under HTS 0511.91.00.90 for other aquatic invertebrates.