3913.90.10.00/Chloroprene Rubber (CR)/Japan

Chloroprene Rubber (CR) from Japan

Chloroprene rubber, a synthetic elastomer produced by polymerization of chloroprene (2-chloro-1,3-butadiene), is a chemical derivative of natural rubber isoprene structure. It is supplied in primary forms such as bales or pellets for use in manufacturing weather-resistant products like wetsuits and hoses. Classified under HTS 3913.90.1000 as it qualifies as a chemical derivative of natural rubber per chapter notes on polymers.

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

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Import Tips

• Verify polymer composition meets 95% chloroprene monomer content per subheading note (a)(1) to avoid reclassification

• Provide certificates of analysis confirming chemical derivation from natural rubber base for CBP review

• Avoid common pitfall of importing pre-compounded forms, which may shift to 4002 as synthetic rubber additions