Hydantoin and its derivatives
Heterocyclic compounds with oxygen hetero-atom(s) only. > Compounds containing an unfused furan ring (whether or not hydrogenated) in the structure: > Sucralose > Hydantoin and its derivatives
Duty Rate (from China)
Subheadings
Products classified under Tariff item 2933.21.00
5,5-Diphenylhydantoin (Phenytoin Base)
5,5-Diphenylhydantoin (Phenytoin Base) is the active pharmaceutical base form of the anticonvulsant phenytoin, a classic hydantoin derivative. It is a separate chemically defined organic compound with an unfused imidazole ring, classifiable under tariff item 2933.21.00.
Allantoin USP
Allantoin USP is a chemically defined hydantoin derivative with an unfused imidazole ring, used in cosmetics, pharmaceuticals, and wound-healing products for its soothing and keratolytic properties. It is classified under tariff item 2933.21.00 as a hydantoin derivative, meeting the chapter 29 criteria for separate chemically defined organic compounds.
Dimethylol Propylene Urea
Dimethylol Propylene Urea is a hydantoin derivative used as a formaldehyde-free crosslinking agent in textile finishing and paper treatment. It is a separate chemically defined organic compound with an unfused imidazole ring, classifiable under tariff item 2933.21.00.
Methone (5,5-Dimethylhydantoin)
Methone (5,5-Dimethylhydantoin) is a hydantoin derivative used as an intermediate in pharmaceutical synthesis and polymer modification. It is a separate chemically defined organic compound with an unfused imidazole ring, classifiable under tariff item 2933.21.00.
Methylethylketone Peroxide Stabilized with Hydroxypropyl Methacrylate
Methylethylketone Peroxide Stabilized with Hydroxypropyl Methacrylate is a hydantoin-structured curing agent used in polymer composites and gelcoat resins. Despite the stabilizer, the core hydantoin compound is classifiable under tariff item 2933.21.00 as a hydantoin derivative, provided the stabilizer does not alter its essential character.
Nitroso-Dimethylol Urea
Nitroso-Dimethylol Urea is a hydantoin derivative used as a slow-release nitrogen source in agricultural applications and slow-cure resins. It is a separate chemically defined organic compound with an unfused imidazole ring, classifiable under tariff item 2933.21.00.
Parabanic Acid
Parabanic Acid is a simple hydantoin derivative used as an analytical reagent and synthetic intermediate. It is a separate chemically defined organic compound with an unfused imidazole ring, classifiable under tariff item 2933.21.00.