Fluorescent Yellow 3G
CAS 12671-74-8
1H-Thioxantheno[2,1,9-def]isoquinoline-1,3(2H)-dione, 2-octadecyl-
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
$1.52/gAaron Chemicals LLC
CountryHong Kong
Pack$152.00 / 100 g
Purity95%
Vendors15 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
14 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 |
|---|---|---|---|---|
| A2B Chem LLC | United States | $1.64 | 25 g | 95% |
| Combi-Blocks, Inc. | United States | $1.65 | 100 g | 95% |
| BLD Pharmatech GmbH | Germany | $1.69 | 100 g | 95% |
| BLD Pharmatech Ltd. | China | $1.69 | 100 g | 95% |
| Angene Chemical | China → Hong Kong | $1.75 | 100 g | 95% |
| AA BLOCKS | United States | $1.84 | 25 g | 95% |
| BLD Pharmatech Co., Limited | United States | $1.86 | 100 g | 95% |
| Ambeed, Inc. | United States | $1.86 | 100 g | 95% |
| AstaTech (2 weeks) | United States | $2.56 | 100 g | 95% |
| AK Scientific, Inc. | United States | $2.60 | 100 g | — |
| Angene International Limited | United States | $4.35 | 100 g | — |
| MedChemExpress MCE | Sweden | $6.78 | 5 g | 98% |
| Labotest KG | Germany | $453.00 | 1000 mg | 90% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 95% |
Chemical Identity
CAS12671-74-8
PubChem CIDNot recorded
DTXSIDDTXSID9065314
FormulaC36H45NO2S
Mol. Weight555.82 g/mol
SMILESCCCCCCCCCCCCCCCCCCN1C(=O)C2=CC=C3SC4=CC=CC=C4C4=CC=C(C1=O)C2=C34
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
Fluorescent Yellow 3G (CAS 12671-74-8) https://chemicalindependence.com/chemical/12671-74-8/ EPA TSCA Inventory: CAS 12671-74-8. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory