Phenanthridine from Mexico
Phenanthridine, a linear tricyclic nitrogen heterocycle used in nucleic acid staining and synthesis. HTS 2933.99.9701 covers this as other nitrogen heterocycles; distinguished from quinoline by fusion pattern.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• HPLC isomer separation proof; angular isomers may go to different subheading
• Biohazard labeling for DNA intercalator properties
• Research chemical imports need end-user certificates