C.I. Acid Violet 43
CAS 4430-18-6
Benzenesulfonic acid, 2-[(9,10-dihydro-4-hydroxy-9,10-dioxo-1-anthracenyl)amino]-5-methyl-, sodium salt (1:1)
This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.
Why supply is unknownProduction is reported production, not a complete census of factories. 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
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.
- Ireland
- United Kingdom
- Spain
- South Korea
- Denmark
- Pakistan
- Hong Kong
- Czech Republic
- Brazil
- Turkey
Why It Matters
No EPA sector or FDA product records name a use for this chemical.
Vendor Pricing
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
9 more vendors
| Vendor | Country Supplier country. Where available, shows shipping origin. When the supplier ships from a different country than where they are registered, both are shown. Most suppliers show registration country only. | $/g | Pack | Purity |
|---|---|---|---|---|
| Combi-Blocks, Inc. | United States | $1.95 | 100 g | 95% |
| A2B Chem LLC | United States | $1.95 | 100 g | 95% |
| Angene Chemical | China → Hong Kong | $2.08 | 500 g | — |
| AA BLOCKS | United States | $2.24 | 100 g | 95% |
| AK Scientific Specialized | United States | $2.28 | 100 g | 95% |
| AK Scientific, Inc. | United States | $3.19 | 100 g | 98% |
| Angene International Limited | United States | $3.85 | 100 g | 95% |
| MedKoo Biosciences, Inc | United States | $22.00 | 25 g | 98% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | — |
Chemical Identity
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
C.I. Acid Violet 43 (CAS 4430-18-6) https://chemicalindependence.com/chemical/4430-18-6/ EPA TSCA Inventory: CAS 4430-18-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 320412 for CAS 4430-18-6. Reporting year: 2024. https://usatrade.census.gov/