2931.90—Other organo-inorganic compounds, other
General 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)
Plain-English explanation
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%. No Chapter 99 tariff modifications or AD/CVD orders currently flag any line under this subheading in Tandom's catalog.
10-digit lines under 2931.90(16)
Pick a line to view full rate detail and compute landed duty
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% Frequently asked questions
What does HTS 2931.90 cover?
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.
What is the duty rate for HTS 2931.90?
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.
How do I find the right 10-digit line under HTS 2931.90?
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.
Are there AD/CVD orders affecting HTS 2931.90?
No active AD/CVD (antidumping or countervailing duty) orders currently flag any line under HTS 2931.90 in Tandom's catalog. Tandom monitors Federal Register notices daily; any new orders will appear here within 24h of publication.
Learn more
Tandom guides relevant to this code
Trade compliance APIs in broker workflows
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
Bulk-classify SKU descriptions with the Tandom HTS Classifier API
Run thousands of product descriptions through HTS classification, score the confidence, and triage borderline rows. Public search endpoint plus the closed-beta three-layer Classifier.
Open resource
How Chapter 99 tariff layers stack on a single entry
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
Write a Claude or ChatGPT prompt for broker-grade HTS classification
Why raw LLM prompts fabricate stat suffixes, why MCP-augmented prompts do not, and the prompt template a broker can hand to Claude or ChatGPT today.
Open resource
What changed for low-value shipments after de minimis suspension
What changed for low-value DTC and ecommerce shipments after Section 321 de minimis was suspended in 2025. Filing, fees, and duty math through 2027.
Open resource
Extract HTS-eligible fields from commercial invoices
Turn a PDF commercial invoice into ACE-ready entry data. Which fields to extract, how to chain extraction into HTS classification and duty calculation.
Open resource