Thieno[3,4-b]-1,4-dioxin, 2,3-dihydro-
CAS 126213-50-1
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
$0.13/gAaron Chemicals LLC
CountryHong Kong
Pack$638.00 / 5 kg
Purity99%
Vendors21 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
20 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 |
|---|---|---|---|---|
| Angene Chemical | China → Hong Kong | $0.17 | 500 g | 99% |
| A2B Chem LLC | United States | $0.26 | 500 g | 98% |
| AA BLOCKS | United States | $0.33 | 500 g | 98% |
| Combi-Blocks, Inc. | United States | $0.34 | 500 g | 98% |
| Ambeed, Inc. | United States | $0.35 | 500 g | 98% |
| Fluorochem EU | Germany | $0.38 | 100 g | 97% |
| AK Scientific Specialized | United States | $0.40 | 500 g | 98% |
| Chemscene | United States | $0.43 | 100 g | — |
| AK Scientific, Inc. | United States | $0.55 | 500 g | 99% |
| Fluorochem UK | United Kingdom | $0.63 | 25 g | 97% |
| Synthonix | United States | $0.80 | 25 g | 95% |
| Angene International Limited | United States | $1.24 | 25 g | 98% |
| AstaTech, Inc | United States | $1.32 | 25 g | 97% |
| Manchester Organics | United Kingdom | $1.69 | 100 g | 97% |
| Apollo Scientific UK | United Kingdom | $1.70 | 100 g | 98% |
| ALFA AESAR | Germany | $11.28 | 25 g | 97% |
| Sigma-Aldrich (Rush Stock) | Germany | $13.68 | 10 g | 97% |
| Sigma-Aldrich | Germany | $13.68 | 10 g | 97% |
| Labotest KG | Germany | $217.80 | 5000 mg | 90% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 99% |
Chemical Identity
CAS126213-50-1
PubChem CIDNot recorded
DTXSIDDTXSID40888925
FormulaC6H6O2S
Mol. Weight142.17 g/mol
SMILESC1COC2=CSC=C2O1
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
Thieno[3,4-b]-1,4-dioxin, 2,3-dihydro- (CAS 126213-50-1) https://chemicalindependence.com/chemical/126213-50-1/ EPA TSCA Inventory: CAS 126213-50-1. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory