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HSChapter 29
U.S. imports of organo-inorganic compounds (nes) (HS 293190) totaled $51.7M in April 2026, traded with 36 countries.
Importers of Organo-Inorganic Compounds (NES) paid $3.9M in duties in April 2026 — an effective duty rate of 8.1% on $48.7M in dutiable value, based on actual customs collections rather than the published tariff schedule. Organo-Inorganic Compounds (NES) imports of $51.7M in April 2026 ran 22% above the year-to-date monthly average of $42.2M.
Last updated: April 2026 dataChina, Germany, and India are the leading US import sources for this broad residual heading, which spans organosilicon compounds (2931909010), organotin stabilizers such as dibutyltin oxide (2931909021) and tetrabutyltin (2931909025), chlorovinylarsines (2931909030–2931909040), aromatic compounds used as drugs (2931902200) or pesticides (2931902600), and a range of boron, silicon, and phosphorus-based specialty chemicals. The chlorovinylarsine lines (lewisite precursors) are subject to CWC controls, while the organotin lines serve the PVC stabilizer and catalyst markets. China-origin imports across several lines in this heading are subject to Section 301 tariffs, making supplier diversification and tariff engineering a priority for procurement teams.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Section 301 tariff applicability is determined at the 10-digit HTS line level, and coverage within this heading is not uniform. Importers should verify each specific line — for example, organosilicon compounds (2931909010) versus organotin compounds (2931909021, 2931909025) — against the current Section 301 list, as some lines may be excluded or subject to different rates.
The distinction turns on the compound's primary commercial use: line 2931902200 covers aromatic organo-inorganic compounds used as pharmaceutical active ingredients or intermediates, while 2931902600 covers those used as pesticide active ingredients. A compound with dual potential uses is classified based on its principal use as presented at importation, supported by documentation such as a product specification sheet or safety data sheet.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CHINA | $19.9M | $2.5M | -$17.4M |
| GERMANY | $8.1M | $1.6M | -$6.4M |
| JAPAN | $4.3M | $4.4M | +$80K |
| NETHERLANDS | $143K | $8.3M | +$8.1M |
| INDIA | $5.9M | $414K | -$5.5M |
Supplier Network
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2931909010 | ORGANO-SILICON COMPOUNDS | $24.5M | 8.13% | $2.0M |
| 2931909052 | NON-AROMATIC ORGANO-INORGANIC COMPOUNDS, NESOI | $19.1M | 5.15% | $947K |
| 2931903000 | OTHER AROM ORGA-INORG ETC OF PROD IN U.S.NT3 SC 6 | $2.6M | 17.54% | $449K |
| 2931906000 | OTH AROM ORG-INORG CMPDS(EXC PROD IN U.S.NT3 SC6) | $1.5M | 35.93% | $223K |
| 2931909029 | ORGANO-TIN COMPOUNDS, NESOI | $1.3M | 9.62% | $48K |
| 2931907000 | N,N-BIS(TRIMETHYLSILYL)UREA; ETC. | $1.1M | 23.67% | $243K |
| 2931909040 | TRIS(2-CHLOROVINYL)ARSINE | $909K | 3.70% | $34K |
| 2931909025 | TETRABUTYLTIN | $413K | 3.70% | $15K |
| 2931900500 | DIPHENYLDICHLOROSILANE; AND PHENYLTRICHLOROSILANE | $146K | 10.00% | $14K |
| 2931901500 | SODIUM TETRAPHENYLBORON | $0 | -- | -- |
| 2931909030 | 2-CHLOROVINYLDICHLOROARSINE | $0 | -- | -- |
| 2931902600 | AROM ORGANO-INORGANO CMPDS USED AS PESTICIDES | $0 | -- | -- |
| 2931901000 | 4,4-DIPHENYL-BIS-PHOSPHONOUS ACID,ETC,PHENYL ESTER | $0 | -- | -- |
| 2931902200 | AROMATIC ORGANO-INORGANIC COMPOUNDS USED AS DRUGS | $0 | -- | -- |
| 2931909021 | DIBUTYLTIN OXIDE | $0 | -- | -- |
ORGANO-SILICON COMPOUNDS
NON-AROMATIC ORGANO-INORGANIC COMPOUNDS, NESOI
OTHER AROM ORGA-INORG ETC OF PROD IN U.S.NT3 SC 6
OTH AROM ORG-INORG CMPDS(EXC PROD IN U.S.NT3 SC6)
ORGANO-TIN COMPOUNDS, NESOI
N,N-BIS(TRIMETHYLSILYL)UREA; ETC.
TRIS(2-CHLOROVINYL)ARSINE
TETRABUTYLTIN
DIPHENYLDICHLOROSILANE; AND PHENYLTRICHLOROSILANE
SODIUM TETRAPHENYLBORON
2-CHLOROVINYLDICHLOROARSINE
AROM ORGANO-INORGANO CMPDS USED AS PESTICIDES
4,4-DIPHENYL-BIS-PHOSPHONOUS ACID,ETC,PHENYL ESTER
AROMATIC ORGANO-INORGANIC COMPOUNDS USED AS DRUGS
DIBUTYLTIN OXIDE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2931909045 | ORGANO-INORGANIC COMPOUNDS, NESOI | $50.2M |
| 2931902200 | AROMATIC ORGANO-INORGANIC COMPOUNDS USED AS DRUGS | $541K |
| 2931901200 | 4,4'-DIPHENYL-BIS-PHOSPHONOUS ACID, ETC. | $484K |
| 2931909040 | TRIS(2-CHLOROVINYL)ARSINE | $17K |
| 2931909030 | 2-CHLOROVINYLDICHLOROARSINE | $12K |
| 2931909035 | BIS(2-CHLOROVINYL)CHLOROARSINE | $6K |
| 2931902600 | AROM ORGANO-INORGANO CMPDS USED AS PESTICIDES | $3K |
ORGANO-INORGANIC COMPOUNDS, NESOI
3.7M kg
AROMATIC ORGANO-INORGANIC COMPOUNDS USED AS DRUGS
41 kg
4,4'-DIPHENYL-BIS-PHOSPHONOUS ACID, ETC.
93.7K kg
TRIS(2-CHLOROVINYL)ARSINE
400 kg
2-CHLOROVINYLDICHLOROARSINE
12 kg
BIS(2-CHLOROVINYL)CHLOROARSINE
775 kg
AROM ORGANO-INORGANO CMPDS USED AS PESTICIDES
91 kg
NUCLEIC ACIDS & SALTS; OTHER HETEROCYCLIC CMP, NES
HS 293499
HETEROCYCLIC COMP W NITROGEN HETERO-ATM ONLY NESOI
HS 293399
POLYPEPTIDE PROTEIN& GLYCOPROTEIN HORMONES &DERIV
HS 293719
CMPDS CONT AN UNFUSED PYRIDINE RING ETC NESOI
HS 293339
COMP WITH PYRIMIDINE OR PIPERAZINE RING, NESOI
HS 293359
ANTIBIOTICS, NESOI
HS 294190
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $7.9M | $10.8M | +$2.9M |
| Kentucky | $1.3M | $10.7M | +$9.4M |
| Pennsylvania | $2.4M | $9.4M | +$7.0M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | $7.9M | $7.7M | -$153K |
| LOS ANGELES, CA | $8.1M | $3.2M | -$4.9M |
| NORFOLK-NEWPORT NEWS, VA | $6.1M | $3.7M | -$2.3M |