2931.90—Other organo-inorganic compounds, otherGeneral duty rate
Free – 6.5%
Across 16 10-digit lines; pick a line below for the exact rate
Coverage on this page
Up one level: 2931 — Other organo-inorganic compounds: (heading)
HTS 2931.90 is a 6-digit subheading of the U.S. Harmonized Tariff Schedule covering Other organo-inorganic compounds, other. It sits in Chapter 29: Organic chemicals, Section VI: Products of the Chemical or Allied Industries and rolls up 16 10-digit statistical lines, with general duty rates ranging from Free to 6.5%. 2 Chapter 99 flags link to one or more child lines (1 active, 1 suspended).
Pick a line to view its exact rate and estimate duties and customs fees
2931.90.05.00Diphenyldichlorosilane; and phenyltrichlorosilaneFree2931.90.10.004,4'-Diphenylbisphosphonous acid, di(2',2",4',4"-di-tert-butyl)phenyl ester6.5%2931.90.15.00Sodium tetraphenylboron5.8%2931.90.22.00Drugs6.5%2931.90.26.00Pesticides6.5% 2931.90.30.00Products described in additional U.S. note 3 to section VI6.5% 2931.90.60.00Other6.5%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 saltsFree2931.90.90.10Organo-silicon compounds3.7% 2931.90.90.21Dibutyltin oxide3.7% 2931.90.90.25Tetrabutyltin3.7% 2931.90.90.29Other3.7% 2931.90.90.302-Chlorovinyldichloroarsine3.7% 2931.90.90.35Bis(2-chlorovinyl)chloroarsine3.7% 2931.90.90.40Tris(2-chlorovinyl)arsine3.7% 2931.90.90.52Other3.7% Provisions linked to one or more lines under 2931.90; applicability depends on origin, product facts, claims, and entry date
| Code | Authority | Rate |
|---|---|---|
| 9903.88.04 | section_301Active | The duty provided in the applicable subheading + 25% |
| 9903.88.16 | section_301Suspended | The duty provided in the applicable subheading + 15% |
HTS 2931.90 is a 6-digit subheading of the U.S. Harmonized Tariff Schedule covering Other organo-inorganic compounds, other. It belongs to Chapter 29 and rolls up 16 10-digit statistical lines that brokers actually file at entry.
General (Column 1) duty rates for the 10-digit lines under HTS 2931.90 range from Free to 6.5%. The exact rate depends on the specific 10-digit statistical line — pick a line below to see its full rate detail.
Tandom links section_301 provision 9903.88.04 to HTS 2931.90. Its published rate notation is The duty provided in the applicable subheading + 25%, and its status on 2026-09-25 is active. 1 additional Chapter 99 flag also link to this code. A flag is not a shipment-level determination; check origin, product facts, claims, and entry date.
U.S. Customs requires entries to be filed at the 10-digit statistical level — the broader subheading HTS 2931.90 is not directly fileable. Match your product description to the most specific 10-digit line in the list on this page; if multiple lines could apply, the General Rules of Interpretation (GRIs) and chapter notes determine which one governs.
Tandom's current catalog view links no potentially relevant AD/CVD (antidumping or countervailing duty) order flags to lines under HTS 2931.90. Check current Commerce scope materials and Federal Register notices before relying on an HTS-only screen.
Tandom guides relevant to this code
How to read, order, and report Chapter 99 HTS codes alongside the base classification on a US entry summary in 2026. The full stacking ladder for brokers and compliance teams.
Open resource
A working guide to the inputs, the layers, and the math behind a US entry summary in 2026. Written for brokers, forwarders, and importer compliance teams.
Open resource
What the 178 active Section 301 exclusions cover, how to claim 9903.88.69 on an entry, and what changes when the November 10, 2026 deadline passes.
Open resource
Drop the Tandom Duty Calculator API into a TMS, broker software, or in-house ERP. Code samples, the response shape, and ACE reporting order, in 2026.
Open resource
What changed April 6, 2026, what stayed the same, and how to file a steel, aluminum, or copper line in ACE without leaving duty exposure on the table.
Open resource
Where trade compliance APIs fit in a broker's filing pipeline: HTS classification, duty calculation, AD/CVD scope match, and post-summary corrections.
Open resource