2512.00.00.00
Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less
Classification path
- Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less
Rates of duty
- General (MFN)
- Free
- Column 2Cuba, North Korea, Russia, Belarus
- Free
- Unit of quantity
- t
About heading 2512
Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less
Heading 2512 covers siliceous fossil meals such as kieselguhr, tripolite and diatomite, and similar siliceous earths with an apparent specific gravity of 1 or less. It applies whether or not the material is calcined. The heading has one declarable line, 2512.00.00.00, with a general (MFN) rate of Free.
Full guide to heading 2512Products in this heading
- Diatomaceous earth filter aid
- Kieselguhr absorbent granules
- Tripolite powder
- Calcined diatomite
- Siliceous earth filler
- Diatomite carrier powder
Frequently asked questions
What is the HTS code for diatomaceous earth filter aid?
Diatomaceous earth filter aid that meets the heading terms is classified under 2512.00.00.00, general (MFN) rate Free.
What is the duty on kieselguhr?
Kieselguhr of heading 2512 enters under 2512.00.00.00 at the general (MFN) rate of Free.
How do I classify tripolite powder?
Classify tripolite powder under 2512.00.00.00 when it is a siliceous fossil meal or similar siliceous earth with apparent specific gravity of 1 or less; the general (MFN) rate is Free.
Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.