C.I. Solvent Yellow 18
CAS 6407-78-9
3H-Pyrazol-3-one, 4-[2-(2,4-dimethylphenyl)diazenyl]-2,4-dihydro-5-methyl-2-phenyl-
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
$240.00/gCombi-Blocks (back-ordered)
CountryUnited States
Pack$1200.00 / 5 g
Purity95%
Vendors7 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
6 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 |
|---|---|---|---|---|
| AK Scientific, Inc. | United States | $505.00 | 1 g | 98% |
| Specs | Netherlands | $2299.00 | 10 mg | 90% |
| AK Scientific Specialized | United States | $12280.00 | 25 mg | 98% |
| MedChemExpress MCE | Sweden | $13249.50 | 100 mg | 98.45% |
| A2B Chem LLC (2 weeks) | United States | $22900.00 | 10 mg | — |
| AA BLOCKS (2 weeks) | United States | $27500.00 | 10 mg | — |
Chemical Identity
CAS6407-78-9
PubChem CIDNot recorded
DTXSIDDTXSID10863784
FormulaC18H18N4O
Mol. Weight306.369 g/mol
SMILESCC1=NN(C(=O)C1N=NC1=C(C)C=C(C)C=C1)C1=CC=CC=C1
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
C.I. Solvent Yellow 18 (CAS 6407-78-9) https://chemicalindependence.com/chemical/6407-78-9/ EPA TSCA Inventory: CAS 6407-78-9. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory