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Chromic acid (H2Cr2O7), compd. with pyridine (1:2)

CAS 20039-37-6

Molecular structure of 20039-37-6
US productionNot reported
Import value, 2024$16M
Top sourceIndia 60%

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 293331 · basket

These shares come from HS customs code 293331, which covers 11 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IN 60%IndiaKR 13%South KoreaCA 10%CanadaCN 7%ChinaJP 3%Japan

Why It Matters

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

Chemical Identity

CAS20039-37-6
PubChem CIDNot recorded
DTXSIDDTXSID60889393
FormulaC10H12Cr2N2O7
Mol. Weight376.205 g/mol
SMILESC1=CC=[NH+]C=C1.C1=CC=[NH+]C=C1.[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O

Data Sources

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Brief citations

Chromic acid (H2Cr2O7), compd. with pyridine (1:2) (CAS 20039-37-6) https://chemicalindependence.com/chemical/20039-37-6/ EPA TSCA Inventory: CAS 20039-37-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 293331 for CAS 20039-37-6. Reporting year: 2024. https://usatrade.census.gov/