2510.20.00.00
Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk / Ground
Classification path
- Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk
- Ground
Rates of duty
- General (MFN)
- Free
- Column 2Cuba, North Korea, Russia, Belarus
- Free
- Unit of quantity
- t
Related lines in heading 2510
About heading 2510
Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk
Heading 2510 covers natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk, which are phosphate-bearing minerals used mainly for fertilizer production and industrial filler. The heading is split by physical form into two lines: unground material in 2510.10.00.00 and ground material in 2510.20.00.00. Both lines carry a general (MFN) rate of Free.
Full guide to heading 2510Products in this heading
- Rock phosphate (phosphate rock) in crude lump form
- Natural calcium phosphate ore
- Natural aluminum calcium phosphate
- Phosphatic chalk
- Ground phosphate rock for fertilizer blending
- Phosphate rock powder for animal feed supplements
- Apatite mineral concentrate of natural origin
Frequently asked questions
What is the HTS code for unground phosphate rock?
Unground natural calcium phosphates fall under 2510.10.00.00, which carries a general (MFN) rate of Free.
What is the duty on ground natural calcium phosphate?
Ground material is classified in 2510.20.00.00 and the general (MFN) rate is Free.
How do I classify phosphatic chalk?
Phosphatic chalk is classified in heading 2510; if it is unground use 2510.10.00.00 and if it is ground use 2510.20.00.00, both at a general (MFN) rate of Free.
Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.