9-(4-fluorobenzylidene)-2,4,5,7-tetranitro-9H-fluorene CAS 253605-81-1
| CAS No. | 253605-81-1 |
| Molecular Formula | C20H9FN4O8 |
| Molecular Weight | 452.31 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 9-(4-fluorobenzylidene)-2,4,5,7-tetranitro-9H-fluorene is closely related to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 9-(4-fluorobenzylidene)-2,4,5,7-tetranitro-9H-fluorene (CAS 253605-81-1), a certified reference material (molecular formula C20H9FN4O8, MW 452.31 g/mol) for analytical method development and quality control.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, 9-(4-fluorobenzylidene)-2,4,5,7-tetranitro-9H-fluorene is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 452.31 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 9-(4-fluorobenzylidene)-2,4,5,7-tetranitro-9H-fluorene 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 | C20H9FN4O8 |
| Molecular Weight | 452.31 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 4 |
Related fluorobenzylidene Standards
- Ethyl 2-(2-fluorobenzylidene)-5-(2-methoxyphenyl)-7-methyl-3-oxo-3,5-dihydro-2H-thiazolo[3,2-a]pyrimidine-6-carboxylate (CAS 371130-05-1)
- N'-(4-Fluorobenzylidene)-5-(4-((4-methylbenzyl)oxy)phenyl)-1H-pyrazole-3-carbohydrazide (CAS 634896-60-9)
- Ethyl 2-(2-fluorobenzylidene)-5-(4-(methoxycarbonyl)phenyl)-7-methyl-3-oxo-3,5-dihydro-2H-thiazolo[3,2-a]pyrimidine-6-carboxylate (CAS 609795-93-9)
- 2-(7-(4-Fluorobenzylidene)-3-(4-fluorophenyl)-3,3a,4,5,6,7-hexahydro-2H-indazol-2-yl)-2-oxoethyl pyrazine-2-carboxylate (CAS 455300-59-1)
- N-(2-(5-(4-Fluorobenzylidene)-2,4-dioxothiazolidin-3-yl)ethyl)-2-(p-tolyl)acetamide (CAS 869351-84-8)
- (Z)-2-(5-(4-fluorobenzylidene)-4-oxo-2-thioxothiazolidin-3-yl)isoindoline-1,3-dione (CAS 477845-34-4)
- 5-(3-Fluorobenzylidene)-2-(4-propoxyphenyl)thiazolo[3,2-b][1,2,4]triazol-6(5H)-one (CAS 606955-41-3)
- (2-Fluorobenzylidene)triphenyl-l5-phosphane (CAS 82757-27-5)
Recommended Standards
- 5-Oxo-2-(trifluoromethyl)-N-(3-(trifluoromethyl)phenyl)-5H-chromeno[2,3-b]pyridine-3-carboxamide (CAS 241127-08-2)
- N-(3-(2-Ethoxyethyl)benzo[d]thiazol-2(3H)-ylidene)-2-iodobenzamide (CAS 865162-48-7)
- 2-Iodo-N-(3-(2-methoxyethyl)-6-methylbenzo[d]thiazol-2(3H)-ylidene)benzamide (CAS 864975-06-4)
- 3-[(3R,4R)-6-Bromo-3-(hydroxymethyl)-3,4-dihydro-2H-1-benzopyran-4-yl]-3-methyl-1-(4-nitrophenyl)thiourea (CAS 321521-55-5)
- 3,4,5-Trifluorobenzene-1,2-diamine (CAS 168966-54-9)
- Methyl 3-(8-Methyl-4-oxoquinazolin-3(4H)-yl)propanoate (CAS 1018186-32-7)
- 2-Chloro-N-(2,4-dibromophenyl)benzamide (CAS 339252-38-9)
- N-(4-(Acridin-9-ylamino)butyl)-4-(bis(2-chloroethyl)amino)benzamide (CAS 125173-78-6)
- 2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-oxopentanoic acid (CAS 1697417-21-2)
- 3-BUtoxy-4-chlorophenol (CAS 1379357-79-5)
- 4-(aminomethyl)-N-butylbenzamide hydrochloride (CAS 1158263-81-0)
- N-(2-Morpholinoethyl)-4,6-diphenylpyridazin-3-amine (CAS 118270-30-7)
- 2-((5-Methyl-1H-pyrazol-3-yl)oxy)ethyl acetate (CAS 866115-19-7)
- (9-D-Asp) Semaglutide X Sodium salt (CAS CATO-CPTD788617)
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