Methylphosphonyl bromide from Mexico
Methylphosphonyl bromide (CH3P(O)Br2) features phosphorus bonded to a single methyl group and two bromines, precisely matching HTS 2931.59.00.60 structural specifications. This compound serves as a phosphorylating agent in nucleotide synthesis.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Biotech intermediates require additional CBP biotech import permits beyond standard chemical clearance
• Declare CAS number 676-97-1 explicitly on commercial invoice for automated customs processing
• Use nitrogen-purged containers to prevent moisture-induced decomposition during storage