HTS heading 2512: Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity

Heading 2512 of the US Harmonized Tariff Schedule covers 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. Below: every rated tariff line in it with its general duty rate, Section 301 China status and exclusions, then a page per line with a free duty calculator.

Official USITC HTS, 2026HTSRev22 · check on hts.usitc.gov

Heading 2512 at a glance

• 1 rated tariff line; 1 duty-free at the general (MFN) rate.
• Section 301 (products of China): 1 of 1 lines on a list in effect (List 3).

Goods named in this heading (official line texts): Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceou….

Subheadings (6-digit)

• 2512.00: Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceou… (1 line)

All tariff lines in heading 2512

All of chapter 25 · Chapter 25 rate summary · HTS lookup

General information from the official US Harmonized Tariff Schedule (USITC) and USTR Section 301 notices in HTS Chapter 99; not legal or customs advice. Classification is decided by CBP; confirm with a licensed customs broker or a CBP binding ruling.

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