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1,3,6-Naphthalenetrisulfonic acid

CAS 86-66-8

Molecular structure of 86-66-8
US productionNot reported
Import value, 2024$40M
Top sourceGermany 22%

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 290410 · basket

These shares come from HS customs code 290410, which covers 115 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
DE 22%GermanyIT 20%ItalyCN 14%ChinaBE 11%BelgiumIN 11%India

Why It Matters

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

Chemical Identity

CAS86-66-8
PubChem CIDNot recorded
DTXSIDDTXSID9058945
FormulaC10H8O9S3
Mol. Weight368.35 g/mol
SMILESOS(=O)(=O)C1=CC2=CC(=CC(=C2C=C1)S(O)(=O)=O)S(O)(=O)=O

Data Sources

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Brief citations

1,3,6-Naphthalenetrisulfonic acid (CAS 86-66-8) https://chemicalindependence.com/chemical/86-66-8/ EPA TSCA Inventory: CAS 86-66-8. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 290410 for CAS 86-66-8. Reporting year: 2024. https://usatrade.census.gov/