Key facts
- HS subheading
- 2931.59
- Duty (MFN)
- 3.7%
- National lines
- 8
- Tariff
- United States
- Chapter
- 29: Organic chemicals
Summary
The United States tariff splits HS 2931.59 (halogenated organo-phosphorous derivatives: Other) into 8 national lines: 2931.59.00.10 (O-Alkyl (≤ C10, including cycloalkyl) alkyl (methyl, ethyl,n- propyl or isopropyl) phosphonofluoridates), 2931.59.00.15 (alkyl (methyl, ethyl, n-propyl or isopropyl) phosphonyl difluorides), 2931.59.00.20 (O-Isopropyl methylphosphonochloridate), 2931.59.00.25 (O-Pinacolyl methylphosphonochloridate) and 4 others. The general (MFN) duty is 3.7% on all 8 lines.
United States lines under 2931.59
The United States tariff splits HS 2931.59 (halogenated organo-phosphorous derivatives: Other) into 8 national lines: 2931.59.00.10 (O-Alkyl (≤ C10, including cycloalkyl) alkyl (methyl, ethyl,n- propyl or isopropyl) phosphonofluoridates), 2931.59.00.15 (alkyl (methyl, ethyl, n-propyl or isopropyl) phosphonyl difluorides), 2931.59.00.20 (O-Isopropyl methylphosphonochloridate), 2931.59.00.25 (O-Pinacolyl methylphosphonochloridate) and 4 others.
The general (MFN) duty is 3.7% on all 8 lines.
- 2931.59.00.10O-Alkyl (≤ C10, including cycloalkyl) alkyl (methyl, ethyl,n- propyl or isopropyl) phosphonofluoridatesDuty: 3.7%
- 2931.59.00.15Alkyl (methyl, ethyl, n-propyl or isopropyl) phosphonyl difluoridesDuty: 3.7%
- 2931.59.00.20O-Isopropyl methylphosphonochloridateDuty: 3.7%
- 2931.59.00.25O-Pinacolyl methylphosphonochloridateDuty: 3.7%
- 2931.59.00.30P-Alkyl (≤ C10, incl. cycloalkyl) N-(1-(dialkyl (≤ C10, incl. cycloalkyl) amino))alkylidene (H or ≤C10, incl. cycloalkyl) phosphonamidic fluorides and corresponding alkylated or protonated saltsDuty: 3.7%
- 2931.59.00.35Methyl- bis(diethylamino)methylene)phosphonamidofluoridateDuty: 3.7%
- 2931.59.00.60Containing a phosphorus atom to which one methyl, ethyl, n-propyl or isopropyl group is bonded but no further carbon atomsDuty: 3.7%
- 2931.59.00.80OtherDuty: 3.7%
In other countries
No other national tariff on border.bot has live lines under 2931.59 yet.
Frequently asked questions
How many national tariff lines does the United States tariff have under HS 2931.59?
The United States tariff splits HS 2931.59 (halogenated organo-phosphorous derivatives: Other) into 8 national lines: 2931.59.00.10 (O-Alkyl (≤ C10, including cycloalkyl) alkyl (methyl, ethyl,n- propyl or isopropyl) phosphonofluoridates), 2931.59.00.15 (alkyl (methyl, ethyl, n-propyl or isopropyl) phosphonyl difluorides), 2931.59.00.20 (O-Isopropyl methylphosphonochloridate), 2931.59.00.25 (O-Pinacolyl methylphosphonochloridate) and 4 others.
What is the duty on HS 2931.59 in the United States?
The general (MFN) duty is 3.7% on all 8 lines.
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: