Cyclopentane from Japan
Cyclopentane (C5H10) is a five-membered ring cycloalkane under HTS 2902.19.00. Primarily used as a blowing agent in polyurethane foam production for insulation, it is a separate chemically defined cyclic hydrocarbon.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include technical data sheet confirming cyclopentane structure per Chapter 29 note (a)
• Classify as UN 1146 Extremely Flammable Liquid with Category 1 labeling
• For foam production use, avoid Chapter 38 if not pre-mixed with other chemicals