Poly[oxy(methylsilylene)]

CAS 9004-73-3

US productionNot reported

Import value, 2024$697M

Top sourceGermany 27%

This chemical is not on EPA’s Toxic Substances Control Act inventory, the list behind EPA’s production survey.

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

Where It Comes From

Customs basis: HS 391000 · basket

These shares come from HS customs code 391000, which covers 22 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).

DE 27%GermanyJP 22%JapanCA 12%CanadaCN 11%ChinaIT 9%Italy

Netherlands
Taiwan
Indonesia
Ireland
Mexico
New Zealand
Hungary
Sweden
Turkey
Norway
Colombia
Switzerland
Austria
Trinidad and Tobago
Australia
Hong Kong
Denmark
Finland
United Arab Emirates
Poland
Portugal
Israel
Singapore
Argentina
Slovenia
Costa Rica
Russia
Dominican Republic
Luxembourg
Romania
Peru
South Africa
Lithuania
Serbia
Liechtenstein
Philippines
Monaco
Latvia
Cambodia
Saudi Arabia

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS9004-73-3

PubChem CIDNot recorded

DTXSIDDTXSID8047501

Formula(CH4OSi)n

Mol. WeightNot recorded

SMILESC[SiH](-*)O-* |$;;star_e;;star_e$,lp:3:2,Sg:n:1,0,3::ht|

Data Sources

EPA CompTox (DSSTox) · DTXSID8047501Retrieved 2026-04-29
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Poly[oxy(methylsilylene)] (CAS 9004-73-3) https://chemicalindependence.com/chemical/9004-73-3/ EPA CompTox (DSSTox): 9004-73-3. Retrieved 2026-04-29. https://comptox.epa.gov/dashboard/chemical/details/DTXSID8047501 US Census international trade: HS 391000 for CAS 9004-73-3. Reporting year: 2024. https://usatrade.census.gov/