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C.I. Pigment Yellow 191:1

CAS 154946-66-4

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

Molecular structure of 154946-66-4
1 NH₃
US productionCBI
Import value, 2024$419M
Top sourceIndia 31%

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 320417 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 320417, which covers 80 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IN 31%IndiaCN 21%ChinaDE 17%GermanyKR 6%South KoreaCA 5%Canada
Domestic parents -- activity not disclosed (1)
Basf

Why It Matters

Sectors
Plastics & RubberPaints & CoatingsPaper & Printing
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 3 sectors as 1 functional role.

  • •Pigment in Paint and Coating Manufacturing (40%)Processing—incorporation into formulation, mixture, or reaction product
  • •Pigment in Printing Ink Manufacturing (20%)Processing—incorporation into formulation, mixture, or reaction product
  • •Pigment in Plastics Material and Resin Manufacturing (40%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS154946-66-4
PubChem CID6850851
DTXSIDDTXSID30890471
FormulaC17H18ClN5O7S2
Mol. Weight503.9 g/mol
SMILESCC1=CC(=C(C=C1Cl)N=NC2C(=NN(C2=O)C3=CC(=CC=C3)S(=O)(=O)O)C)S(=O)(=O)O.N

Data Sources

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Brief citations

C.I. Pigment Yellow 191:1 (CAS 154946-66-4) https://chemicalindependence.com/chemical/154946-66-4/ EPA CompTox (DSSTox): DTXSID30890471. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID30890471 PubChem: 6850851. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6850851 EPA Chemical Data Reporting: 154946-66-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 154946-66-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 320417 for CAS 154946-66-4. Reporting year: 2024. https://usatrade.census.gov/