HS Code for Hydantoin

Hydantoin and its derivatives are classified under HS code 2933.21. This code is situated within Chapter 29, which covers organic chemicals. Heading 2933 is dedicated to heterocyclic compounds with nitrogen hetero-atom(s) only. Specifically, the 2933.2x group covers compounds containing an unfused imidazole ring, whether or not hydrogenated. Hydantoin (glycolylurea) is a heterocyclic organic compound with the formula CH2C(O)NHC(O)NH. It is considered a cyclic urea. The classification 2933.21 is a specific named subheading, which takes precedence over more general subheadings like 2933.29 according to GRI 1. The chemical structure must feature the five-membered ring containing two nitrogens at positions 1 and 3. Derivatives of hydantoin, such as those used in the production of anticonvulsants, disinfectants, or resins, remain in this code provided they do not have other functional groups that would move them to a different chapter or heading. For example, if the hydantoin derivative is formulated as a medicament for retail sale, it would be classified in Chapter 30. However, as a pure chemical or a bulk derivative, 2933.21 is the correct designation.

Products Included

• Hydantoin (Glycolylurea)
• 5,5-Dimethylhydantoin (DMH)
• Allantoin (a hydantoin derivative)
• Phenytoin (bulk pharmaceutical grade)
• 1,3-Dibromo-5,5-dimethylhydantoin

Common Misclassification

Hydantoin is often confused with 2933.29, which is the residual category for other imidazole derivatives. It can also be misclassified under 3004.90 if it is imported as a finished pharmaceutical product (e.g., anti-seizure medication) rather than a raw chemical compound.

FAQ

What is the HS code for Hydantoin?

The HS code for hydantoin and its derivatives is 2933.21.

Are all imidazole derivatives under this code?

No, only hydantoin and its specific derivatives are under 2933.21. Other unfused imidazole derivatives are classified under 2933.29.