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[1,1'-Bianthracene]-9,9',10,10'-tetrone, 2,2'-dimethyl-

CAS 81-26-5

Molecular structure of 81-26-5
US productionNot reported
Import value, 2024$35M
Top sourceChina 49%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

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 291469 · basket

These shares come from HS customs code 291469, which covers 31 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 49%ChinaIN 17%IndiaJP 11%JapanNL 9%NetherlandsIT 8%Italy

Why It Matters

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

Chemical Identity

CAS81-26-5
PubChem CIDNot recorded
DTXSIDDTXSID1058840
FormulaC30H18O4
Mol. Weight442.47 g/mol
SMILESCC1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1C1=C2C(=O)C3=CC=CC=C3C(=O)C2=CC=C1C

Data Sources

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Brief citations

[1,1'-Bianthracene]-9,9',10,10'-tetrone, 2,2'-dimethyl- (CAS 81-26-5) https://chemicalindependence.com/chemical/81-26-5/ EPA TSCA Inventory: CAS 81-26-5. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 291469 for CAS 81-26-5. Reporting year: 2024. https://usatrade.census.gov/