C.I. Basic Red 29
CAS 42373-04-6
Thiazolium, 3-methyl-2-[2-(1-methyl-2-phenyl-1H-indol-3-yl)diazenyl]-, chloride (1:1)
EPA and Census publish no US supply data for this chemical.
US productionNot reported
Top sourceNo public record
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 unknownWhere It Comes From
EPA and Census publish no US supply data for this chemical.
Why It Matters
No EPA sector or FDA product records name a use for this chemical.
Vendor Pricing
$5.20/gA2B Chem LLC
CountryUnited States
Pack$130.00 / 25 g
PurityNot recorded
Vendors8 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
7 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 |
|---|---|---|---|---|
| Sigma-Aldrich (Rush Stock) | Germany | $5.34 | 25 g | — |
| Sigma-Aldrich | Germany | $5.34 | 25 g | — |
| Angene Chemical | China → Hong Kong | $5.60 | 25 g | — |
| AK Scientific, Inc. | United States | $47.40 | 5 g | 95% |
| Angene International Limited | United States | $79.80 | 5 g | 95% |
| Labotest KG | Germany | $453.00 | 1000 mg | 90% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | — |
Chemical Identity
CAS42373-04-6
PubChem CIDNot recorded
DTXSIDDTXSID0030900
FormulaC19H17ClN4S
Mol. Weight368.88 g/mol
SMILES[Cl-].CN1C2=C(C=CC=C2)C(\N=N\C2=[N+](C)C=CS2)=C1C1=CC=CC=C1
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
C.I. Basic Red 29 (CAS 42373-04-6) https://chemicalindependence.com/chemical/42373-04-6/ EPA TSCA Inventory: CAS 42373-04-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory