2836.99.30.00 - Commercial ammonium carbonate and other ammonium carbonates

This HTS subheading, 2836.99.30.00, specifically covers commercial ammonium carbonate and other forms of ammonium carbonates not elsewhere specified within heading 2836. These are inorganic chemical compounds where the carbonate ion is bonded to ammonium ions. "Commercial ammonium carbonate" typically refers to a mixture of ammonium carbonate and ammonium carbamate, often used in various industrial applications.

Distinguishing this category from its siblings, 2836.99.30.00 is not for metallic carbonates such as cobalt carbonates (2836.99.10.00), bismuth carbonate (2836.99.20.00), or lead carbonates (2836.99.40.00). It also differs from the broader "Other" category at 2836.99.50, as it specifically isolates ammonium-based carbonates. This subcategory serves as a distinct classification for compounds solely involving ammonium and carbonate ions.

As this is a leaf node within the HTS, there are no further subdivisions. Therefore, classification under 2836.99.30.00 relies on accurately identifying the product as an ammonium carbonate and ensuring it is not classifiable under any more specific preceding subheading within heading 2836. This often involves verifying the chemical composition and ensuring the absence of metallic cations or other distinct chemical functionalities that would place it in a different classification.