Quino[2,3-b]acridine-6,7,13,14(5H,12H)-tetrone, 2,9-dichloro-

CAS 2490-60-0

US productionNot reported

Import value, 2024$1.4B

Top sourceIreland 33%

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 293399 · basket

These shares come from HS customs code 293399, which covers 518 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).

IE 33%IrelandCN 26%ChinaIN 11%IndiaDE 9%GermanyIT 4%Italy

Taiwan
Poland
Canada
Ivory Coast
Greece
Hungary
Indonesia
Latvia
Belgium
Slovakia
Czech Republic
Austria
Netherlands
Finland
Denmark
Croatia
Australia
South Africa
Sweden
Hong Kong
Malta
Singapore
Lithuania
Malaysia
Oman
Serbia

Why It Matters

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

Chemical Identity

CAS2490-60-0

PubChem CIDNot recorded

DTXSIDDTXSID6062462

FormulaC20H8Cl2N2O4

Mol. Weight411.19 g/mol

SMILESOC1=C2C=C(Cl)C=CC2=NC2=C1C(=O)C1=C(C(O)=C3C=C(Cl)C=CC3=N1)C2=O

Data Sources

EPA TSCA InventoryRetrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Quino[2,3-b]acridine-6,7,13,14(5H,12H)-tetrone, 2,9-dichloro- (CAS 2490-60-0) https://chemicalindependence.com/chemical/2490-60-0/ EPA TSCA Inventory: CAS 2490-60-0. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 293399 for CAS 2490-60-0. Reporting year: 2024. https://usatrade.census.gov/