4-Aminophthalic acid
CAS 5434-21-9
1,2-Benzenedicarboxylic acid, 4-amino-
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
$0.38/gAaron Chemicals LLC
CountryHong Kong
Pack$191.00 / 500 g
Purity95%
Vendors20 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
19 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 |
|---|---|---|---|---|
| Combi-Blocks, Inc. | United States | $0.39 | 1 kg | 96% |
| Angene Chemical | China → Hong Kong | $0.41 | 500 g | 97% |
| BLD Pharmatech Ltd. | China | $0.45 | 1 kg | 95% |
| A2B Chem LLC | United States | $0.48 | 1 kg | 95% |
| AA BLOCKS | United States | $0.51 | 1 kg | 95% |
| AK Scientific, Inc. | United States | $0.56 | 500 g | 98% |
| MedChemExpress MCE | Sweden | $0.66 | 1 kg | 99.64% |
| Fluorochem EU | Germany | $0.69 | 100 g | 95% |
| AK Scientific Specialized | United States | $0.70 | 100 g | 95% |
| BLD Pharmatech Co., Limited | United States | $0.76 | 100 g | 95% |
| Ambeed, Inc. | United States | $0.76 | 100 g | 95% |
| Fluorochem UK | United Kingdom | $0.86 | 25 g | 95% |
| BLD Pharmatech GmbH | Germany | $1.04 | 25 g | 95% |
| AstaTech (2 weeks) | United States | $1.14 | 500 g | 97% |
| Angene International Limited | United States | $1.15 | 100 g | 95% |
| ALFA AESAR | Germany | $53.04 | 5 g | 98% |
| Labotest KG | Germany | $217.80 | 5000 mg | 90% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 97% |
| TimTec, LLC | United States | $9333.33 | 30 mg | 98% |
Chemical Identity
CAS5434-21-9
PubChem CIDNot recorded
DTXSIDDTXSID8063880
FormulaC8H7NO4
Mol. Weight181.147 g/mol
SMILESNC1=CC(C(O)=O)=C(C=C1)C(O)=O
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
4-Aminophthalic acid (CAS 5434-21-9) https://chemicalindependence.com/chemical/5434-21-9/ EPA TSCA Inventory: CAS 5434-21-9. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory