2850.00.05.00
Of calcium
Classification path
- Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 2849
- Of calcium
Rates of duty
- General (MFN)
- Free
- Column 2Cuba, North Korea, Russia, Belarus
- 25%
- Unit of quantity
- kg
Related lines in heading 2850
About heading 2850
Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 2849
Heading 2850 covers hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, except compounds that are also carbides of heading 2849. It is split by metal: calcium, titanium, tungsten, vanadium, and other.
Full guide to heading 2850Products in this heading
- Calcium hydride
- Titanium nitride
- Tungsten boride
- Vanadium nitride
- Sodium azide
- Calcium silicide
- Boron nitride
Frequently asked questions
What is the HTS code for titanium nitride?
Titanium nitride is classified under 2850.00.07.00; the general (MFN) rate is 4.9%.
What is the duty on tungsten boride?
Tungsten boride is classified under 2850.00.10.00; the general (MFN) rate is 5.5%.
How do I classify sodium azide?
Sodium azide is an azide not listed under calcium, titanium, tungsten or vanadium, so it falls under 2850.00.50.00, with a general (MFN) rate of 3.7%.
Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.