Key facts
- HS subheading
- 3815.90
- National lines
- 4
- Tariff
- United States
- Chapter
- 38: Miscellaneous chemical products
Summary
The United States tariff splits HS 3815.90 (reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included) into 4 national lines: 3815.90.10.00 (of bismuth, of tungsten or of vanadium), 3815.90.20.00 (of mercury or of molybdenum), 3815.90.30.00 (other) and 3815.90.50.00 (other). The general (MFN) duty differs by line: 6.5% on 3815.90.10.00, 2.8% on 3815.90.20.00, free on 3815.90.30.00 and 5% on 3815.90.50.00.
United States lines under 3815.90
The United States tariff splits HS 3815.90 (reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included) into 4 national lines: 3815.90.10.00 (of bismuth, of tungsten or of vanadium), 3815.90.20.00 (of mercury or of molybdenum), 3815.90.30.00 (other) and 3815.90.50.00 (other).
The general (MFN) duty differs by line: 6.5% on 3815.90.10.00, 2.8% on 3815.90.20.00, free on 3815.90.30.00 and 5% on 3815.90.50.00.
- 3815.90.10.00Of bismuth, of tungsten or of vanadiumDuty: 6.5%
- 3815.90.20.00Of mercury or of molybdenumDuty: 2.8%
- 3815.90.30.00OtherDuty: Free
- 3815.90.50.00OtherDuty: 5%
In other countries
No other national tariff on border.bot has live lines under 3815.90 yet.
Frequently asked questions
How many national tariff lines does the United States tariff have under HS 3815.90?
The United States tariff splits HS 3815.90 (reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included) into 4 national lines: 3815.90.10.00 (of bismuth, of tungsten or of vanadium), 3815.90.20.00 (of mercury or of molybdenum), 3815.90.30.00 (other) and 3815.90.50.00 (other).
What is the duty on HS 3815.90 in the United States?
The general (MFN) duty differs by line: 6.5% on 3815.90.10.00, 2.8% on 3815.90.20.00, free on 3815.90.30.00 and 5% on 3815.90.50.00.
Sources and updates
The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
This page was last updated on 9 October 2026.
Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.
Official source files: