O,O',O''-(methylsilylidyne)trioxime 2-pentanone

CAS 37859-55-5

EPA’s 2023 records show zero U.S. production of this chemical.

US productionZero

Import value, 2024$537M

Import volumeCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Top sourceChina 39%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 293190 · basket

EPA reports by year

2023: US production Zero · Imports Confidential
2019: US production Not published · Imports Not published

These shares come from HS customs code 293190, which covers 378 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

CN 39%ChinaDE 17%GermanyIT 9%ItalyIN 7%IndiaJP 7%Japan

Ireland
Netherlands
Switzerland
Monaco
Ukraine
Spain
Mexico
Poland
Indonesia
Armenia
Israel
Sweden
Australia
Czech Republic
Hungary
Brunei
Hong Kong
Brazil
Thailand
Argentina
Finland
Austria
Latvia

EPA-registered importers (3)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Sika Ag · CH Switzerland

Hilti

Sika

Why It Matters

Sectors

Construction

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

•Chemical reaction regulator in Construction (100%)Processing—incorporation into article

Chemical Identity

CAS37859-55-5

PubChem CID154734426

DTXSIDDTXSID701015697

FormulaC16H33N3O3Si

Mol. Weight343.54 g/mol

SMILESCCCC(=NO[Si](C)(ON=C(C)CCC)ON=C(C)CCC)C

Data Sources

EPA CompTox (DSSTox) · DTXSID701015697Retrieved 2026-04-06
PubChem · compound 154734426Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

O,O',O''-(methylsilylidyne)trioxime 2-pentanone (CAS 37859-55-5) https://chemicalindependence.com/chemical/37859-55-5/ EPA CompTox (DSSTox): DTXSID701015697. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID701015697 PubChem: 154734426. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/154734426 EPA Chemical Data Reporting: 37859-55-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 37859-55-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293190 for CAS 37859-55-5. Reporting year: 2024. https://usatrade.census.gov/