Malonylurea (barbituric acid) and its salts
Heterocyclic compounds with nitrogen hetero-atom(s) only. > Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure: > Malonylurea (barbituric acid) and its salts > Malonylurea (barbituric acid) and its salts
Duty Rate (from China)
Products classified under Tariff item 2933.52
5,5-Diethylbarbituric Acid Intermediate
Pure barbituric acid used as an intermediate for synthesizing 5,5-diethylbarbituric acid (barbital). It is a separate chemically defined organic compound with a pyrimidine ring, falling under tariff item 2933.52.00 as malonylurea (barbituric acid) and its salts.
2933.52.00Barbituric Acid
Barbituric acid (malonylurea) is a heterocyclic compound with a pyrimidine ring, serving as the core scaffold for barbiturate pharmaceuticals. It is a separate chemically defined organic compound, classifiable under tariff item 2933.52.00.
2933.52.00Barbituric Acid Aqueous Solution
Barbituric acid dissolved in water, as permitted by Chapter 29 note (d). The aqueous solution is a normal method of putting up for safety or transport, and the solvent does not render it suitable for specific use, so it remains classifiable under tariff item 2933.52.00.
2933.52.00Barbituric Acid (pure)
Malonylurea, also known as barbituric acid, is the parent pyrimidine heterocyclic compound. It is directly classifiable under tariff item 2933.52.00 as the base compound and its salts, per the tariff description.
2933.52.00Barbituric Acid Technical Grade
Technical grade malonylurea (90-95% purity) for industrial synthesis of pharmaceutical intermediates and agrochemicals. Despite lower purity, it qualifies as a separate chemically defined compound under Chapter 29 note (a), classifiable under tariff item 2933.52.00.
2933.52.00Barbituric Acid with Stabilizer
Barbituric acid containing an added stabilizer necessary for preservation during transport, as permitted by Chapter 29 note (f). The stabilizer does not render it suitable for specific use, so it remains classifiable under tariff item 2933.52.00.
2933.52.00Laboratory Reagent Barbituric Acid
ACS reagent grade barbituric acid for analytical chemistry and organic synthesis in research laboratories. Supplied as white crystalline powder with specified purity, it is a separate chemically defined compound under tariff item 2933.52.00.
2933.52.00Pharmaceutical Grade Barbituric Acid Powder
High-purity barbituric acid powder (≥99%) manufactured specifically for use in API synthesis of barbiturate sedatives and anticonvulsants. Meets USP/EP pharmacopeia standards and is classifiable under tariff item 2933.52.00 as malonylurea.
2933.52.00Research Quantity Barbituric Acid
Small quantity barbituric acid packaged for research institutions and university laboratories. Despite small packaging, it qualifies as a separate chemically defined compound under tariff item 2933.52.00, not a retail consumer product.