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C.I. Acid Red 18, trisodium salt

CAS 2611-82-7

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

Molecular structure of 2611-82-7
3 Na⁺
US productionCBI
Import value, 2024$56M
Top sourceIndia 70%

At least one company claimed its 2023 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: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 320412 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Zero · Imports 25.7K lb

These shares come from HS customs code 320412, which covers 106 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IN 70%IndiaMY 7%MalaysiaCH 4%SwitzerlandCN 4%ChinaDE 3%Germany
EPA-registered importers (1)
Target

Why It Matters

Sectors
Textiles
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

  • •Dye in Synthetic Dye and Pigment Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS2611-82-7
PubChem CID17466
DTXSIDDTXSID9021213
FormulaC20H11N2Na3O10S3
Mol. Weight604.5 g/mol
SMILESC1=CC=C2C(=C1)C(=CC=C2S(=O)(=O)[O-])N=NC3=C(C=CC4=CC(=CC(=C43)S(=O)(=O)[O-])S(=O)(=O)[O-])O.[Na+].[Na+].[Na+]

Data Sources

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Brief citations

C.I. Acid Red 18, trisodium salt (CAS 2611-82-7) https://chemicalindependence.com/chemical/2611-82-7/ EPA CompTox (DSSTox): DTXSID9021213. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9021213 PubChem: 17466. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/17466 EPA Chemical Data Reporting: 2611-82-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 2611-82-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 320412 for CAS 2611-82-7. Reporting year: 2024. https://usatrade.census.gov/