1,5-Bis(4-nitrophenyl)-3-phenylformazan CAS 21420-47-3
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 21420-47-3 |
| Molecular Formula | C19H16N6O4 |
| Molecular Weight | 392.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1,5-Bis(4-nitrophenyl)-3-phenylformazan (CAS 21420-47-3) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C19H16N6O4. Molecular weight: 392.37 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C19H16N6O4 |
| Molecular Weight | 392.37 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 6 |
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Recommended Standards
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- 3-[2-(trifluoromethyl)phenyl]-1H-pyrazole-5-carboxylic acid (CAS 1038770-76-1)
- N-Phenyl-1H-benzo[d][1,2,3]triazole-1-carboxamide (CAS 86298-24-0)
- 2-(3-Chloro-5-(trifluoromethyl)pyridin-2-yl)-1-(4-(4-chlorophenyl)piperazin-1-yl)propan-1-one (CAS 303148-36-9)
- Salbutamol EP Impurity O TFA salt (CAS 2387728-91-6(Free Base))
- 1-(1-Isopropyl-1H-pyrazol-5-yl)-N-((tetrahydrofuran-2-yl)methyl)methanamine hydrochloride (CAS 1856086-38-8)
- N-(5-Fluoresceinyl)-L-carnitine-O-thiocarbamate (CAS 1258239-73-4)
- Semaglutide impurity 43 (CAS CATO-C4X-222643)
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