2,5-Cyclohexadiene-1,4-dione, 2-methyl-5-(1-methylethyl)-
CAS 490-91-5
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 unknownProduction is reported production, not a complete census of factories. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.
Where It Comes From
Customs basis: HS 291469 · basket
These shares come from HS customs code 291469, which covers 31 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Germany
- Taiwan
- 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.
26 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 | $2.80 | 100 g | 97% |
| Combi-Blocks, Inc. | United States | $2.98 | 100 g | 97% |
| A2B Chem LLC | United States | $3.20 | 100 g | 97% |
| AA BLOCKS | United States | $3.38 | 100 g | 10% |
| AK Scientific Specialized | United States | $4.40 | 100 g | 97% |
| AK Scientific, Inc. | United States | $5.50 | 100 g | 99% |
| Fluorochem EU | Germany | $5.81 | 10 g | 97% |
| Chemscene | United States | $6.30 | 100 g | — |
| Ambeed, Inc. | United States | $6.40 | 10 g | 10% |
| BLD Pharmatech GmbH | Germany | $6.53 | 100 g | 99% |
| BLD Pharmatech Ltd. | China | $6.53 | 100 g | 99% |
| Angene International Limited | United States | $8.79 | 100 g | 99% |
| BLD Pharmatech Co., Limited | United States | $9.00 | 5 g | 99% |
| MedKoo Biosciences, Inc | United States | $26.00 | 25 g | 98% |
| TargetMol Chemicals | China → United States | $40.00 | 1 g | 99.7% |
| Cayman Europe | Estonia | $44.03 | 5 g | 98% |
| AstaTech (2 weeks) | United States | $61.70 | 10 g | 98% |
| MedChemExpress MCE | Sweden | $62.92 | 1 g | 99.8% |
| Sigma-Aldrich (Rush Stock) | Germany | $92.11 | 5 g | 98% |
| Sigma-Aldrich | Germany | $92.11 | 5 g | 98% |
| Molnova | China | $370.00 | 100 mg | 99% |
| Labotest KG | Germany | $453.00 | 1000 mg | 90% |
| ChemNorm | China | $700.00 | 50 mg | 98% |
| Maybridge, Ltd. | United Kingdom | $2414.30 | 100 mg | 90% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 97% |
| TimTec, LLC (back-ordered) | United States | $32000.00 | 15 mg | 94% |
Chemical Identity
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
2,5-Cyclohexadiene-1,4-dione, 2-methyl-5-(1-methylethyl)- (CAS 490-91-5) https://chemicalindependence.com/chemical/490-91-5/ EPA TSCA Inventory: CAS 490-91-5. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 291469 for CAS 490-91-5. Reporting year: 2024. https://usatrade.census.gov/