4-Carboxy-Pennsylvania Green CAS 879288-14-9
| CAS No. | 879288-14-9 |
| Molecular Formula | C21H12F2O5 |
| Molecular Weight | 382.31 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 4-Carboxy-Pennsylvania Green under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
4-Carboxy-Pennsylvania Green (CAS 879288-14-9), molecular formula C21H12F2O5 and molecular weight 382.31 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 4-Carboxy-Pennsylvania Green (C21H12F2O5) is characterized by a flavonoid core, a hydroxyl group, an ether linkage, fluorine substitution. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
Physical & Chemical Properties
| Molecular Formula | C21H12F2O5 |
| Molecular Weight | 382.31 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | F-containing |
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Recommended Standards
- 3-(4-Chlorophenyl)-2-[(3-chlorophenyl)sulfanyl]quinoline (CAS 339013-20-6)
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- N-[[3-(4-fluorophenyl)-2-oxo-5-oxazolidinyl]methyl]-4-(trifluoromethyl)-Benzamide (CAS 954642-81-0)
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- (1-Ethenyl-1H-imidazole-κN3)-Os(4,4′-Dimethyl-2,2′-bipyridine)2Cl2 (CAS 1357064-10-8)
- 2-[(2,3-Dihydro-1,4-benzodioxin-6-yl)sulfonyl]-1,2,3,4-tetrahydro-3-isoquinolinecarboxylic acid (CAS 1008266-08-7)
- Methyl 4-hydroxy-6-oxo-1-(4-phenoxyphenyl)-1,6-dihydropyridazine-3-carboxylate (CAS 306976-44-3)
- 5-Cyanonicotinic Acid (CAS 887579-62-6)
- 2-[(thiophen-3-ylmethyl)sulfanyl]ethan-1-amine (CAS 901273-26-5)
- Ethyl 2-[(5-methoxy-1H-indol-2-yl)carbonyl]hydrazinecarboxylate (CAS 1706435-77-9)
- 2-(2-Phenylethoxy)ethan-1-amine hydrochloride (CAS 1185298-89-8)
- Methyl 1-methyl-1,4-dihydropyridine-3-carboxylate (CAS 59138-83-9)
- Semaglutide impurity 198 (CAS CATO-C4X-2226198)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com