1,3,6,8-Pyrenetetrasulfonic acid

CAS 6528-53-6

U.S. production volumes are classified as confidential business information.

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Import value, 2024$40M

Import volumeZero

Top sourceGermany 22%

At least one company claimed its 2019 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2019. 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

EPA reports by year

2019: US production Confidential · Imports Zero

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

Country of origin for US imports, from Census customs data (2024).

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

Spain
Netherlands
Czech Republic
Brazil
Taiwan
Hong Kong

EPA-registered manufacturers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Dystar

Why It Matters

Sectors

Textiles

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

•Dyes in Synthetic Dye and Pigment Manufacturing (100%)Processing as a reactant

Chemical Identity

CAS6528-53-6

PubChem CID81017

DTXSIDDTXSID5044310

FormulaC16H10O12S4

Mol. Weight522.5 g/mol

SMILESC1=CC2=C3C(=C(C=C2S(=O)(=O)O)S(=O)(=O)O)C=CC4=C(C=C(C1=C43)S(=O)(=O)O)S(=O)(=O)O

Data Sources

EPA CompTox (DSSTox) · DTXSID5044310Retrieved 2026-04-06
PubChem · compound 81017Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

1,3,6,8-Pyrenetetrasulfonic acid (CAS 6528-53-6) https://chemicalindependence.com/chemical/6528-53-6/ EPA CompTox (DSSTox): DTXSID5044310. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID5044310 PubChem: 81017. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/81017 EPA Chemical Data Reporting: 6528-53-6. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 6528-53-6. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290410 for CAS 6528-53-6. Reporting year: 2024. https://usatrade.census.gov/