9-(4-Nitrobenzylidene)-9H-fluorene CAS 6954-71-8
| CAS No. | 6954-71-8 |
| Molecular Formula | C20H13NO2 |
| Molecular Weight | 299.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
9-(4-Nitrobenzylidene)-9H-fluorene (CAS 6954-71-8), molecular formula C20H13NO2 and molecular weight 299.32 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C20H13NO2, 9-(4-Nitrobenzylidene)-9H-fluorene contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 299.32 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C20H13NO2 |
| Molecular Weight | 299.32 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
Related Nitrobenzylidene Standards
- 9-(3-Nitrobenzylidene)-9H-fluorene (CAS 4421-51-6)
- (E)-2-((4-nitrobenzylidene)amino)isoindoline-1,3-dione (CAS 32387-08-9)
- (Z)-4-(2-nitrobenzylidene)-2-phenyloxazol-5(4h)-one (CAS 66949-10-8)
- (Z)-4-(3-Nitrobenzylidene)-2-phenyloxazol-5(4H)-one (CAS 66949-11-9)
- (Z)-4-(4-nitrobenzylidene)-2-phenyloxazol-5(4h)-one (CAS 57427-80-2)
- (Z)-4-(4-Nitrobenzylidene)-3-phenylisoxazol-5(4H)-one (CAS 61588-01-0)
- 3-((2-Nitrobenzylidene)amino)quinazolin-4(3H)-one (CAS 88404-50-6)
- 3-((4-Nitrobenzylidene)amino)quinazolin-4(3H)-one (CAS 62176-69-6)
Recommended Standards
- 9,10-Anthracenedione, 1-(phenylamino)- (CAS 2944-28-7)
- 6,7-Dimethoxy-N-((5-methylfuran-2-yl)methyl)quinazolin-4-amine (CAS 477860-00-7)
- Acetic 2-((4-(benzyloxy)phenyl)amino)acetic anhydride (CAS 24451-08-9)
- 6-(2,5-Dimethylfuran-3-yl)-1-(propan-2-yl)-1h-pyrazolo[3,4-b]pyridine-4-carboxylic acid (CAS 924249-82-1)
- rel-(2R,6S)-4-(6-Chloropyrimidin-4-yl)-2,6-dimethylmorpholine (CAS 1601278-62-9)
- (R)-But-3-yn-2-amine (CAS 54139-78-5)
- Cetamolol (CAS 34919-98-7)
- Methyl 1-methyl-1,2,3,6-tetrahydropyridine-4-carboxylate (CAS 59097-06-2)
- Methyl 3-amino-4-cyano-5-(piperidin-1-yl)thiophene-2-carboxylate (CAS 499771-09-4)
- 2-Isobutyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoic Acid (CAS 890839-13-1)
- 1-[(3,5-dimethylisoxazol-4-yl)methyl]piperazine dihydrochloride (CAS 333992-86-2)
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- N-((1-Cyclopentyl-1H-pyrazol-4-yl)methyl)-1-propyl-1H-pyrazol-4-amine hydrochloride (CAS 1856081-23-6)
- D-Tyr1-Tirzepatide (CAS CATO-CPTD788928)
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