Key facts
- HS subheading
- 2521.00
- Duty (MFN)
- Free
- National lines
- 1
- Tariff
- United States
- Chapter
- 25: Salt; sulphur; earths and stone; plastering materials, lime and cement
Summary
The United States tariff splits HS 2521.00 (limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement) into 1 national line: 2521.00.00.00 (limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement). Every United States line under 2521.00 is free of general (MFN) duty.
United States lines under 2521.00
The United States tariff splits HS 2521.00 (limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement) into 1 national line: 2521.00.00.00 (limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement).
Every United States line under 2521.00 is free of general (MFN) duty.
- 2521.00.00.00Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cementDuty: Free
In other countries
No other national tariff on border.bot has live lines under 2521.00 yet.
Frequently asked questions
How many national tariff lines does the United States tariff have under HS 2521.00?
The United States tariff splits HS 2521.00 (limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement) into 1 national line: 2521.00.00.00 (limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement).
What is the duty on HS 2521.00 in the United States?
Every United States line under 2521.00 is free of general (MFN) duty.
Sources and updates
The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
This page was last updated on 9 October 2026.
Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.
Official source files: