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C.I. Acid Orange 7

CAS 633-96-5

Benzenesulfonic acid, 4-[2-(2-hydroxy-1-naphthalenyl)diazenyl]-, sodium salt (1:1)

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

Molecular structure of 633-96-5
1 Na⁺
US productionZero
Import value, 2024$56M
Import volume4.4K 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.

C.I. Acid Orange 7 · 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 4.4K 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)
Aakash Chemicals

Why It Matters

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

Industrial Uses

  • •Dye in Textiles, apparel, and leather manufacturingProcessing—incorporation into article

Chemical Identity

CAS633-96-5
PubChem CIDNot recorded
DTXSIDDTXSID0038881
FormulaC16H11N2NaO4S
Mol. Weight350.32 g/mol
SMILES[Na+].OC1=C(N=NC2=CC=C(C=C2)S([O-])(=O)=O)C2=CC=CC=C2C=C1

Data Sources

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Brief citations

C.I. Acid Orange 7 (CAS 633-96-5) https://chemicalindependence.com/chemical/633-96-5/ EPA TSCA Inventory: CAS 633-96-5. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 633-96-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 633-96-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 320412 for CAS 633-96-5. Reporting year: 2024. https://usatrade.census.gov/