1,3-Benzenedisulfonic acid, 4-formyl-, sodium salt (1:2)

CAS 33513-44-9

Used in 1 industrial sector tracked by the EPA.

Molecular structure of 33513-44-9 — 2 Na⁺

US productionNot reported

Import value, 2024$3M

Top sourceIndia 77%

EPA lists this chemical for 2023 but publishes zero or no volume for both production and imports.

Production is reported production, not a complete census of factories. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 291300 · basket

EPA reports by year

2023: US production Not published · Imports Not published

These shares come from HS customs code 291300, which covers 36 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).

IN 77%IndiaCN 11%ChinaUA 5%UkraineJP 3%JapanDE 2%Germany

United Kingdom
Austria

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Aceto Us

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

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

Chemical Identity

CAS33513-44-9

PubChem CIDNot recorded

DTXSIDDTXSID80889714

FormulaC7H4Na2O7S2

Mol. Weight310.2 g/mol

SMILES[Na+].[Na+].[O-]S(=O)(=O)C1=CC=C(C=O)C(=C1)S([O-])(=O)=O

Data Sources

EPA TSCA InventoryRetrieved 2026-04-29
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

1,3-Benzenedisulfonic acid, 4-formyl-, sodium salt (1:2) (CAS 33513-44-9) https://chemicalindependence.com/chemical/33513-44-9/ EPA TSCA Inventory: CAS 33513-44-9. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 33513-44-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 33513-44-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291300 for CAS 33513-44-9. Reporting year: 2024. https://usatrade.census.gov/