Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 2849
5 declarable lines
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.
Products in this heading
- Calcium hydride
- Titanium nitride
- Tungsten boride
- Vanadium nitride
- Sodium azide
- Calcium silicide
- Boron nitride
How to choose the right subheading
- Identify the chemical family: hydride, nitride, azide, silicide or boride.
- Identify the metal in the compound, because calcium, titanium, tungsten and vanadium have specific lines.
- Confirm the compound is not also a carbide of heading 2849.
- If the metal is not calcium, titanium, tungsten or vanadium, use the Other line.
- Chemical definition status does not change the heading, which covers whether or not chemically defined.
Often confused with
- Heading 2849Tungsten carbide
Carbides are excluded from heading 2850 and classified in heading 2849.
- Heading 2849Silicon carbide
This is a carbide, so it falls in heading 2849, not heading 2850.
- Heading 2849Boron carbide
Carbides are excluded from heading 2850 even when the element also forms borides.
- Heading 7202Ferrovanadium
This is a ferroalloy, not a chemical compound of heading 2850.
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%.
Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.