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Acid Yellow 121

CAS 5601-29-6

Chromate(1-), bis[2-[2-[4,5-dihydro-3-methyl-5-(oxo-κO)-1-phenyl-1H-pyrazol-4-yl]diazenyl-κN1]benzoato(2-)-κO]-, hydrogen (1:1)

Companies reported imports and no US production of this chemical to EPA for 2023.

Molecular structure of 5601-29-6
1 Cr³⁺ · 1 H⁺
US productionZero
Import value, 2024$56M
Import volume45.5K lb
Import dependency100%
Top sourceIndia 70%

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.

Acid Yellow 121 · US import value by year
$63M2013$90M2022$56M2024$58M2025

2013: $63M · Peak 2022: $90M · 2024: $56M · 2025: $58M

Where It Comes From

Customs basis: HS 320412 · basket

EPA reports by year
2023
US production Zero · Imports 45.5K 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

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

Chemical Identity

CAS5601-29-6
PubChem CIDNot recorded
DTXSIDDTXSID00897452
FormulaC34H25CrN8O6
Mol. Weight693.62 g/mol
SMILES[H+].[Cr+3].CC1=NN(C(=O)[C-]1N=NC1=CC=CC=C1C([O-])=O)C1=CC=CC=C1.CC1=NN(C(=O)[C-]1N=NC1=CC=CC=C1C([O-])=O)C1=CC=CC=C1

Data Sources

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Brief citations

Acid Yellow 121 (CAS 5601-29-6) https://chemicalindependence.com/chemical/5601-29-6/ EPA TSCA Inventory: CAS 5601-29-6. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 5601-29-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 320412 for CAS 5601-29-6. Reporting year: 2024. https://usatrade.census.gov/