4-((2-Ethoxy-3,4-dioxocyclobut-1-en-1-yl)amino)benzoic acid CAS 175204-30-5
| CAS No. | 175204-30-5 |
| Molecular Formula | C13H11NO5 |
| Molecular Weight | 261.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
4-((2-Ethoxy-3,4-dioxocyclobut-1-en-1-yl)amino)benzoic acid (CAS 175204-30-5), molecular formula C13H11NO5 and molecular weight 261.23 g/mol, is a CATO reference standard with documented purity and traceability.
4-((2-Ethoxy-3,4-dioxocyclobut-1-en-1-yl)amino)benzoic acid (C13H11NO5) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), 4-((2-Ethoxy-3,4-dioxocyclobut-1-en-1-yl)amino)benzoic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C13H11NO5 |
| Molecular Weight | 261.23 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2007 |
| Nitrogen Atoms | 1 |
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Recommended Standards
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- 2-((2,4-Difluorophenyl)thio)acetonitrile (CAS 175277-63-1)
- (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(5-bromo-2-methoxyphenyl)propanoic acid (CAS 220497-51-8)
- N-Nitroso Terbutaline impurity 132 (CAS CATO-C4X-1183132)
- 2-(3-Phenylisoxazol-5-yl)acetic acid (CAS 3919-84-4)
- (3-Ethoxy-4-methoxyphenyl)methanamine (CAS 108439-67-4)
- (1-(5-Chloro-2-fluorophenyl)-1H-1,2,3-triazol-4-yl)methanol (CAS 1248655-36-8)
- 6-Methylbenz[a]anthracene-d14 (CAS 1794945-92-8)
- 1,2-Diheptadecanoyl-rac-glycerol (CAS 98896-81-2)
- Semaglutide impurity 44 (CAS CATO-C4X-222644)
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