Heading 2836

Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate

15 declarable lines

Heading 2836 covers carbonates, peroxocarbonates (percarbonates), and commercial ammonium carbonate containing ammonium carbamate. The heading splits first by the specific carbonate: sodium, potassium, calcium and barium have their own lines, while the rest fall under 2836.91 (lithium), 2836.92 (strontium) and 2836.99 (cobalt, bismuth, ammonium, lead and residual other). Rates in this heading range from free to 5.5% general (MFN).

Products in this heading

Sodium bicarbonate (baking soda)
Sodium carbonate (soda ash)
Calcium carbonate
Potassium bicarbonate
Barium carbonate
Lithium carbonate
Cobalt carbonate
Commercial ammonium carbonate

How to choose the right subheading

Identify the cation: sodium, potassium, calcium, barium, lithium, strontium, cobalt, bismuth, lead, ammonium or other.
Check whether the product is a normal carbonate or a hydrogencarbonate (bicarbonate), since these sit on separate lines for sodium and potassium.
Confirm the product is a carbonate or peroxocarbonate and not a hydroxide, sulfate, nitrate or chloride.
For lithium carbonates, check whether the material is U.S.P. grade, which decides between 2836.91.00.10 and 2836.91.00.50.
If the cation is not named in a specific line, classify in the residual 2836.99 lines by the metal named there or as other.

Often confused with

Sodium hydroxide (caustic soda)
A hydroxide, not a carbonate.
Heading 2815
Sodium sulfate
A sulfate, classified in the sulfates heading.
Heading 2833
Sodium hypochlorite
A hypochlorite, covered by the hypochlorites heading.
Heading 2828
Sodium nitrate
A nitrate, covered by the nitrites and nitrates heading.
Heading 2834
Ammonium chloride
A chloride, not a carbonate.
Heading 2827

Frequently asked questions

What is the HTS code for sodium bicarbonate?

Sodium hydrogencarbonate (sodium bicarbonate) is 2836.30.00.00, with a general (MFN) rate of Free.

What is the duty on calcium carbonate?

Calcium carbonate is 2836.50.00.00, and the general (MFN) rate is Free.

How do I classify lithium carbonate?

Lithium carbonates fall under 2836.91. U.S.P. grade goes in 2836.91.00.10 at 3.7% general (MFN), and all other lithium carbonates go in 2836.91.00.50 at 3.7% general (MFN).

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.