Deuterated Chlormethine (d6) from China
Deuterium-labeled bis(2-chloroethyl)methylamine (d6 isotope) is a chemically defined acyclic monoamine analog under HTS 2921.19.61.30. Used in NMR spectroscopy and metabolic studies. Isotopic substitution doesn't alter classification per Chapter 29 scope.
Duty Rate — China → United States
44%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Include isotopic enrichment certificate (≥98% D); NRC licensing may apply for heavy isotopes
• Segregate from unlabeled material in customs docs
• Validate against 2845 for isotopic elements