Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 5-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-3',6'-dihydroxy-, hydrochloride (1:1)
CAS 21811-74-5
EPA and Census publish no US supply data for this chemical.
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
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 |
|---|---|---|---|---|
| AA BLOCKS | United States | $622.00 | 1 g | 98% |
| Combi-Blocks (back-ordered) | United States | $770.00 | 1 g | 95% |
| Cayman Europe | Estonia | $904.40 | 250 mg | 98% |
| Sigma-Aldrich (Rush Stock) | Germany | $907.72 | 1 g | 90% |
| Sigma-Aldrich | Germany | $907.72 | 1 g | 90% |
| Angene International Limited | United States | $960.00 | 1 g | 98% |
| Aaron Chemicals LLC | Hong Kong | $2220.00 | 250 mg | — |
Chemical Identity
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 5-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-3',6'-dihydroxy-, hydrochloride (1:1) (CAS 21811-74-5) https://chemicalindependence.com/chemical/21811-74-5/ EPA TSCA Inventory: CAS 21811-74-5. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory