Diethyl methylidenemalonate
CAS 3377-20-6
Propanedioic acid, 2-methylene-, 1,3-diethyl ester
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
$616.00/gAaron Chemicals LLC
CountryHong Kong
Pack$154.00 / 250 mg
Purity97%
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 |
|---|---|---|---|---|
| Angene Chemical | China → Hong Kong | $664.00 | 250 mg | 97% |
| A2B Chem LLC | United States | $1223.00 | 1 g | 95% |
| AA BLOCKS | United States | $1357.00 | 1 g | 95% |
| AstaTech, Inc | United States | $1752.00 | 250 mg | 95% |
| Angene International Limited | United States | $1908.00 | 1 g | 95% |
| Combi-Blocks (back-ordered) | United States | $1920.00 | 250 mg | 95% |
Chemical Identity
CAS3377-20-6
PubChem CIDNot recorded
DTXSIDDTXSID901033182
FormulaC8H12O4
Mol. Weight172.18 g/mol
SMILESCCOC(=O)C(=C)C(=O)OCC
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
Diethyl methylidenemalonate (CAS 3377-20-6) https://chemicalindependence.com/chemical/3377-20-6/ EPA TSCA Inventory: CAS 3377-20-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory