1H,3H-Naphtho(1,8-cd)pyran-1,3-dione
CAS 81-84-5
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 291739 · basket
- 2023
- US production Zero · Imports Confidential
- 2019
- US production Confidential · Imports Confidential
These shares come from HS customs code 291739, which covers 103 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Netherlands
- Malaysia
- Colombia
- Switzerland
- Turkey
- Germany
- Peru
- Brazil
- Sweden
- Belgium
- Denmark
- Czech Republic
- Ukraine
- Hong Kong
Why It Matters
Industrial Uses
Used in 2 sectors as 2 functional roles.
- •Intermediate in Synthetic Dye and Pigment Manufacturing (100%)Processing as a reactant
- •Lubricating agent in All Other Basic Organic Chemical Manufacturing (40%)Processing as a reactant
Vendor Pricing
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
18 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 | $0.10 | 500 g | 98% |
| ALFA AESAR | Germany | $0.18 | 1 kg | 97% |
| Key Organics Ltd. | United Kingdom | $0.26 | 500 g | 95% |
| Sigma-Aldrich (Rush Stock) | Germany | $0.29 | 500 g | — |
| Sigma-Aldrich | Germany | $0.29 | 500 g | — |
| Combi-Blocks, Inc. | United States | $0.32 | 1 kg | 95% |
| Apollo Scientific UK | United Kingdom | $0.38 | 250 g | 98% |
| AK Scientific Specialized | United States | $0.69 | 100 g | 95% |
| AK Scientific, Inc. | United States | $0.70 | 500 g | 98% |
| Fluorochem EU | Germany | $1.25 | 100 g | 95% |
| Fluorochem UK | United Kingdom | $1.27 | 100 g | 95% |
| Interbioscreen | Hong Kong | $12.00 | 10 g | 95% |
| Labotest KG | Germany | $217.80 | 5000 mg | 90% |
| Otava, Ltd. | Ukraine | $460.00 | 250 mg | 95% |
| Specs | Netherlands | $794.00 | 5 g | 90% |
| Princeton BioMolecular Research (SC) | United States | $2900.00 | 100 mg | 90% |
| Vitas M Chemical Limited | Hong Kong | $4020.00 | 50 mg | 90% |
| ChemDiv, Inc. | United States | $7666.67 | 15 mg | 90% |
Chemical Identity
Data Sources
- EPA CompTox (DSSTox) · DTXSID4026505Retrieved 2026-04-06
- PubChem · compound 6693Retrieved 2026-04-06
- EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
- EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
1H,3H-Naphtho(1,8-cd)pyran-1,3-dione (CAS 81-84-5) https://chemicalindependence.com/chemical/81-84-5/ EPA CompTox (DSSTox): DTXSID4026505. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4026505 PubChem: 6693. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6693 EPA Chemical Data Reporting: 81-84-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 81-84-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291739 for CAS 81-84-5. Reporting year: 2024. https://usatrade.census.gov/