4,4'-((9H-Fluoren-9-ylidene)methylene)dibenzoic acid CAS 2172939-31-8
| CAS No. | 2172939-31-8 |
| Molecular Formula | C28H18O4 |
| Molecular Weight | 418.44 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 418.44 g/mol gives 4,4'-((9H-Fluoren-9-ylidene)methylene)dibenzoic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4,4'-((9H-Fluoren-9-ylidene)methylene)dibenzoic acid (CAS 2172939-31-8), molecular formula C28H18O4 and molecular weight 418.44 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 4,4'-((9H-Fluoren-9-ylidene)methylene)dibenzoic acid (C28H18O4) is characterized by a steroid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 4,4'-((9H-Fluoren-9-ylidene)methylene)dibenzoic acid 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.
Physical & Chemical Properties
| Molecular Formula | C28H18O4 |
| Molecular Weight | 418.44 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| 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) | 20.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1998 |
Related H Standards
- 5-(1-(((9H-Fluoren-9-yl)methoxy)carbonyl)piperidin-4-yl)oxazole-4-carboxylic acid (CAS 2138361-00-7)
- 1-(1-(((9H-Fluoren-9-yl)methoxy)carbonyl)piperidin-3-yl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 2092279-32-6)
- 1-(1-{[(9H-fluoren-9-yl)methoxy]carbonyl}piperidin-4-yl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 2091154-19-5)
- 2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-2-(2-nitrophenyl)acetic acid (CAS 915696-44-5)
- 2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-4-(methylselanyl)butanoic acid (CAS 1369531-99-6)
- (9H-fluoren-9-yl)methyl (R)-(3-(benzyloxy)-2-(hydroxymethyl)propyl)carbamate (CAS 1265897-02-6)
- 1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-4-(1H-pyrazol-1-yl)piperidine-4-carboxylic acid (CAS 2137773-58-9)
- 1-(1-{[(9H-fluoren-9-yl)methoxy]carbonyl}piperidin-3-yl)-1H-pyrazole-3-carboxylic acid (CAS 2091853-19-7)
Recommended Standards
- 2,2'-Diphenyl-[2,2'-bibenzofuran]-3,3'(2H,2'H)-dione (CAS 63136-74-3)
- 4,4'-(Anthracene-9,10-diyl)dibenzoic acid (CAS 42824-53-3)
- 2-([1,1'-Biphenyl]-4-carbonyl)-1,4-diaminoanthracene-9,10-dione (CAS 89868-45-1)
- 2-((7-Cyano-3,4-dihydro-2H-1,4-ethano-1,5-naphthyridin-6-yl)thio)-N-(4-(trifluoromethyl)phenyl)acetamide (CAS 728003-20-1)
- Methyl 1-amino-3-(1h-imidazol-1-yl)cyclohexane-1-carboxylate (CAS 1537382-38-9)
- (s)-4-Amino-2,2-difluoropentanedioic acid (CAS 130835-20-0)
- <SC>L</SC>-Menthyl lactate (CAS 185915-25-7)
- (1S,2R,4R)-Bicyclo[2.2.1]heptan-2-amine (CAS 84235-34-7)
- 4-Chloro-5-isopropyl-1H-pyrazol-3-amine (CAS 110086-10-7)
- 5-Chloro-4-iodopyridin-3-ol (CAS 1807171-86-3)
- 4-[Butyl(methyl)amino]-3-nitrobenzoic acid (CAS 1019465-91-8)
- (2S,3S)-2-((tert-Butoxycarbonyl)amino)-3-hydroxy-3-(pyridin-2-yl)propanoic acid (CAS 1134779-28-4)
- (4R,4'R)-2,2'-Cyclopentylidenebis[4,5-dihydro-4-(phenylmethyl)oxazole] (CAS 2005443-99-0)
- D-[Ala]24-Semaglutide (CAS CATO-C4X-2226126)
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