4-((9H-Fluoren-9-ylidene)methyl)benzimidamide CAS 1729-61-9
| CAS No. | 1729-61-9 |
| Molecular Formula | C21H16N2 |
| Molecular Weight | 296.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-((9H-Fluoren-9-ylidene)methyl)benzimidamide (CAS 1729-61-9), molecular formula C21H16N2 and molecular weight 296.37 g/mol, is a CATO reference standard with documented purity and traceability.
4-((9H-Fluoren-9-ylidene)methyl)benzimidamide (C21H16N2) contains a nitrogen-containing heterocyclic scaffold, a nitrile group. Its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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.
Physical & Chemical Properties
| Molecular Formula | C21H16N2 |
| Molecular Weight | 296.37 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | 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.) | 1957 |
| Nitrogen Atoms | 2 |
Related H Standards
- (9H-Fluoren-9-yl)methyl (2-amino-2-oxoethyl)carbamate (CAS 115057-37-9)
- (9H-Fluoren-9-yl)methyl (2-hydroxyethyl)(methyl)carbamate (CAS 147687-15-8)
- (9H-Fluoren-9-yl)methyl (3-hydroxypropyl)carbamate (CAS 157887-82-6)
- (9H-Fluoren-9-yl)methyl (R)-(1-hydroxypropan-2-yl)carbamate (CAS 202751-95-9)
- (9H-fluoren-9-yl)methyl hydroxy(propyl)carbamate (CAS 198411-61-9)
- (9H-Fluoren-9-yl)methyl diethylcarbamate (CAS 119306-69-3)
- 4-((9H-Fluoren-9-ylidene)methyl)aniline (CAS 6967-16-4)
- 4-((9H-fluoren-9-ylidene)methyl)-N,N-dimethylaniline (CAS 2871-86-5)
Recommended Standards
- (4-(Diethylamino)-2-phenylpyrazolo[1,5-a]pyrazin-3-yl)methanol (CAS 1713173-95-5)
- tert-butyl N-{[1-(1,2,4-oxadiazol-3-ylmethyl)piperidin-3-yl]methyl}carbamate (CAS 1803560-79-3)
- N-(6-(4-Methylpiperidin-1-yl)pyrimidin-4-yl)benzamide (CAS 1706108-92-0)
- tert-butyl 4-[3-(dimethylamino)-1,2,4-oxadiazol-5-yl]piperidine-1-carboxylate (CAS 1803580-77-9)
- 1-Bromo-2-propoxynaphthalene (CAS 60514-36-5)
- 5-(Bromomethyl)-2-(methylthio)pyrimidine (CAS 323591-23-7)
- (S)-2-(Methylamino)butanoic acid (CAS 88930-11-4)
- N-Cyclohexyl-3-nitroaniline (CAS 121086-17-7)
- 1-(3,5-Dimethylphenyl)-5-(1-methyl-3-(trifluoromethyl)-1H-pyrazol-4-yl)-1H-tetrazole (CAS 321526-30-1)
- 5,7-Dichloro-1,6-naphthyridine (CAS 337958-60-8)
- N-Benzyl-2-chloro-N-(2-chloroethyl)ethan-1-amine (CAS 55-51-6)
- 2-Cyclohexylcyclopropan-1-amine (CAS 19009-70-2)
- 2-Cyclopentylpyridine (CAS 56657-02-4)
- Insulin Degludec Impurity 14 (CAS CATO-C4X-215714)
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