Phenanthridine from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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