2933.52.10.00 - Malonylurea (barbituric acid)

This HTS category specifically covers Malonylurea, also known as barbituric acid, and its salts. Barbituric acid is a heterocyclic organic compound that serves as the fundamental structure for a class of drugs known as barbiturates. These compounds are characterized by their pyrimidine ring structure.

This classification is distinct from its sibling category, 2933.52.90.00, which is designated for "Other" malonylurea derivatives and their salts not specifically identified here. Therefore, any import or export of barbituric acid or its salts will be classified under this specific HTS code, while other related, but not identical, compounds would fall under the "Other" designation.

As this is a leaf node in the HTS classification system, there are no further subcategories. This means that all goods meeting the description of Malonylurea (barbituric acid) and its salts, regardless of purity or specific salt form, are classified directly under this heading. Examples would include barbituric acid in its pure form or common salt derivatives used in pharmaceutical preparations or chemical synthesis.