4-Cyclohexene-1,2-dicarboxylic acid, 1,2-bis(2-oxiranylmethyl) ester
CAS 21544-03-6
EPA’s 2023 records show zero U.S. production of this chemical.
At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.
Why supply is unknownProduction is reported production, not a complete census of factories. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.
Where It Comes From
Customs basis: HS 291720 · basket
- 2023
- US production Zero · Imports Confidential
These shares come from HS customs code 291720, which covers 42 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Ukraine
- South Africa
- Malaysia
- Netherlands
- Mexico
- United Kingdom
- Switzerland
- Latvia
- Canada
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.
15 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 | $0.06 | 500 g | — |
| Fluorochem EU | Germany | $0.10 | 500 g | 95% |
| BLD Pharmatech Ltd. | China | $0.14 | 1 kg | 99% |
| A2B Chem LLC | United States | $0.16 | 500 g | — |
| Chemscene | United States | $0.16 | 500 g | — |
| BLD Pharmatech Co., Limited | United States | $0.17 | 500 g | 99% |
| Ambeed, Inc. | United States | $0.17 | 500 g | 99% |
| AA BLOCKS | United States | $0.19 | 100 g | — |
| MedChemExpress MCE | Sweden | $0.21 | 500 g | — |
| BLD Pharmatech GmbH | Germany | $0.24 | 100 g | 99% |
| Combi-Blocks, Inc. | United States | $0.30 | 500 g | 99% |
| AK Scientific, Inc. | United States | $1.29 | 100 g | 95% |
| Angene International Limited | United States | $7.92 | 25 g | — |
| AstaTech (2 weeks) | United States | $120.40 | 5 g | 98% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | — |
Chemical Identity
Data Sources
- EPA TSCA InventoryRetrieved 2026-04-29
- EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
4-Cyclohexene-1,2-dicarboxylic acid, 1,2-bis(2-oxiranylmethyl) ester (CAS 21544-03-6) https://chemicalindependence.com/chemical/21544-03-6/ EPA TSCA Inventory: CAS 21544-03-6. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 21544-03-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291720 for CAS 21544-03-6. Reporting year: 2024. https://usatrade.census.gov/