Key facts
- HS subheading
- 2931.90
- National lines
- 16
- Tariff
- United States
- Chapter
- 29: Organic chemicals
Summary
The United States tariff splits HS 2931.90 (other organo-inorganic compounds) into 16 national lines: 2931.90.05.00 (diphenyldichlorosilane; and phenyltrichlorosilane), 2931.90.10.00 (4,4'-Diphenylbisphosphonous acid, di(2',2",4',4"-di-tert-butyl)phenyl ester), 2931.90.15.00 (sodium tetraphenylboron), 2931.90.22.00 (drugs) and 12 others.
United States lines under 2931.90
The United States tariff splits HS 2931.90 (other organo-inorganic compounds) into 16 national lines: 2931.90.05.00 (diphenyldichlorosilane; and phenyltrichlorosilane), 2931.90.10.00 (4,4'-Diphenylbisphosphonous acid, di(2',2",4',4"-di-tert-butyl)phenyl ester), 2931.90.15.00 (sodium tetraphenylboron), 2931.90.22.00 (drugs) and 12 others.
- 2931.90.05.00Diphenyldichlorosilane; and phenyltrichlorosilaneDuty: Free
- 2931.90.10.004,4'-Diphenylbisphosphonous acid, di(2',2",4',4"-di-tert-butyl)phenyl esterDuty: 6.5%
- 2931.90.15.00Sodium tetraphenylboronDuty: 5.8%
- 2931.90.22.00DrugsDuty: 6.5%
- 2931.90.26.00PesticidesDuty: 6.5%
- 2931.90.30.00Products described in additional U.S. note 3 to section VIDuty: 6.5%
- 2931.90.60.00OtherDuty: 6.5%
- 2931.90.70.00N,N'-Bis(trimethylsilyl) urea; 3-(Hydroxymethylphosphinyl)-1-propanoic acid, 2-hydroxyethyl ester; and 2-Phosphonobutane-1,2,4-tricarboxylic acid and its saltsDuty: Free
- 2931.90.90.10Organo-silicon compoundsDuty: 3.7%
- 2931.90.90.21Dibutyltin oxideDuty: 3.7%
- 2931.90.90.25TetrabutyltinDuty: 3.7%
- 2931.90.90.29OtherDuty: 3.7%
- 2931.90.90.302-ChlorovinyldichloroarsineDuty: 3.7%
- 2931.90.90.35Bis(2-chlorovinyl)chloroarsineDuty: 3.7%
- 2931.90.90.40Tris(2-chlorovinyl)arsineDuty: 3.7%
- 2931.90.90.52OtherDuty: 3.7%
In other countries
No other national tariff on border.bot has live lines under 2931.90 yet.
Frequently asked questions
How many national tariff lines does the United States tariff have under HS 2931.90?
The United States tariff splits HS 2931.90 (other organo-inorganic compounds) into 16 national lines: 2931.90.05.00 (diphenyldichlorosilane; and phenyltrichlorosilane), 2931.90.10.00 (4,4'-Diphenylbisphosphonous acid, di(2',2",4',4"-di-tert-butyl)phenyl ester), 2931.90.15.00 (sodium tetraphenylboron), 2931.90.22.00 (drugs) and 12 others.
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: