4H-3,1-Benzoxazin-4-one, 2,2'-(1,4-phenylene)bis-
CAS 18600-59-4
U.S. production volumes are classified as confidential business information.
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. US production volume is confidential. 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 293499 · basket
- 2023
- US production Confidential · Imports 31.9K lb
- 2019
- US production Confidential · Imports Confidential
These shares come from HS customs code 293499, which covers 575 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Finland
- Netherlands
- Canada
- Indonesia
- Mexico
- Taiwan
- South Korea
- Austria
- Croatia
- Sweden
- Ukraine
- Denmark
- Israel
- Czech Republic
- New Zealand
- Hong Kong
- Kyrgyzstan
- Australia
- Portugal
- South Africa
- Poland
- Slovenia
- Brazil
- Slovakia
- Vietnam
- Latvia
- Malta
- Hungary
- Romania
- Kenya
- Belarus
- Russia
- Turkey
- Norway
Why It Matters
Industrial Uses
- •UV stabilizer in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
Vendor Pricing
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
16 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 | $0.89 | 500 g | 98% |
| Combi-Blocks, Inc. | United States | $1.40 | 100 g | 98% |
| BLD Pharmatech Ltd. | China | $1.54 | 100 g | 95% |
| A2B Chem LLC | United States | $1.60 | 100 g | 98% |
| AA BLOCKS | United States | $1.85 | 100 g | 98% |
| AK Scientific Specialized | United States | $2.40 | 100 g | 95% |
| Ambeed, Inc. | United States | $2.50 | 10 g | 95% |
| AK Scientific, Inc. | United States | $3.21 | 100 g | 99% |
| Angene International Limited | United States | $5.28 | 100 g | 99% |
| AstaTech (2 weeks) | United States | $180.00 | 5 g | 95% |
| Labotest KG | Germany | $453.00 | 1000 mg | 90% |
| Vitas M Chemical Limited | Hong Kong | $4020.00 | 50 mg | 90% |
| Princeton BioMolecular Research (SC) | United States | $4200.00 | 50 mg | 90% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 98% |
| Asinex | Netherlands | $9292.80 | 50 mg | 90% |
| TimTec, LLC (back-ordered) | United States | $32000.00 | 15 mg | 94% |
Chemical Identity
Data Sources
- EPA CompTox (DSSTox) · DTXSID40864845Retrieved 2026-04-06
- PubChem · compound 3098422Retrieved 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
4H-3,1-Benzoxazin-4-one, 2,2'-(1,4-phenylene)bis- (CAS 18600-59-4) https://chemicalindependence.com/chemical/18600-59-4/ EPA CompTox (DSSTox): DTXSID40864845. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID40864845 PubChem: 3098422. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/3098422 EPA Chemical Data Reporting: 18600-59-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 18600-59-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293499 for CAS 18600-59-4. Reporting year: 2024. https://usatrade.census.gov/