HS Code 2512
Siliceous Fossil Meals and Diatomaceous Earth
HS code 2512 covers siliceous fossil meals like diatomite and kieselguhr with a specific gravity of 1 or less, used for industrial filtration and absorption.
HS Code 2512 — Siliceous Fossil Meals and Diatomaceous Earth
This code covers lightweight, porous sedimentary rocks formed from the remains of microscopic algae. Commonly known as kieselguhr or diatomite, these earths are used primarily as filtration media, industrial absorbents, and abrasive polishing agents.
What's included
- Kieselguhr
- Tripolite
- Diatomite
- Calcined siliceous earths
- Moler earth
What's excluded
- Activated diatomite → use
3802(Chemical treatment for activation moves it to Chapter 38.) - Silica sand → use
2505(Not from fossilised remains.)
Common examples
- Natural diatomaceous earth powder
- Calcined kieselguhr filter aid
- Raw tripolite mineral
- Diatomite granules for absorbent use
Frequently asked questions
Does 2512 include activated diatomite?
No, if the diatomite is chemically activated (e.g., with acids or flux), it should be classified under heading 3802.
Trade & shipping notes
- Typical duty range: 0% - 5%
- Documentation: Requires a Material Safety Data Sheet (MSDS) to confirm specific gravity is 1 or less and that it is not activated.
- Typical shipping mode: FCL
- Top exporters: United States, China, Denmark, Mexico
- Top importers: Germany, Canada, Belgium, Japan
Related HS codes
Key takeaway
Classification depends strictly on the specific gravity (must be 1 or less) and the absence of chemical activation.
Related HS codes
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