2,3-Diphenylquinoxaline-5-carboxylic acid CAS 90833-20-8
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 90833-20-8 |
| Molecular Formula | C21H14N2O2 |
| Molecular Weight | 326.35 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2,3-Diphenylquinoxaline-5-carboxylic acid (CAS 90833-20-8) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C21H14N2O2. Molecular weight: 326.35 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C21H14N2O2 |
| Molecular Weight | 326.35 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 DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 2 |
Related Diphenylquinoxaline Standards
- 2,3-Diphenylquinoxaline-6-carboxylic acid (CAS 32387-96-5)
- 2,3-Diphenylquinoxaline-6,7-dicarbonitrile (CAS 361980-89-4)
- 2,3-Diphenylquinoxaline-6-sulfonamide (CAS 380347-87-5)
- 2,3-Diphenylquinoxaline-6-carboxylic Acid 2-Hydroxyethyl Amide (CAS 332404-53-2)
- 2,3-Diphenylquinoxaline (CAS 1684-14-6)
- 5,8-Diphenylquinoxaline (CAS 919282-34-1)
Recommended Standards
- 2',3,5-Trifluoro-4''-propyl-1,1':4',1''-terphenyl (CAS 857048-78-3)
- 2',3,5-Trifluoro-4''-propyl-[1,1':4',1''-terphenyl]-4-ol (CAS 953049-31-5)
- 2-Amino-10,11-dimethoxy-7,8,12b,13-tetrahydro-5H-1,3,6-triazatetraphen-5-one (CAS 685106-53-0)
- Astrophloxine (CAS 14696-39-0)
- 5,10-Dihydroxy-2,8-dimethylpyrimido[5,4-g]quinazoline-4,6(1H,7H)-dione (CAS 115705-72-1)
- N-((3-Isopropyl-1-methyl-1H-pyrazol-5-yl)methyl)-3-methylbutan-1-amine hydrochloride (CAS 1855945-66-2)
- (1S,8aS)-Methyl octahydropyrrolo[1,2-a]pyrazine-1-carboxylate (CAS 273223-56-6)
- 2,4-Dimethylcyclohexane-1-sulfonamide (CAS 1343027-23-5)
- 2-(4-Ethoxypiperidin-1-yl)ethan-1-ol (CAS 1307799-17-2)
- Semaglutide Impurity 122 (CAS CATO-C4X-2226122)
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