L-Leucine 9-fluorenylmethyl ester hydrochloride CAS 197162-68-8
| CAS No. | 197162-68-8 |
| Molecular Formula | C20H23NO2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies L-Leucine 9-fluorenylmethyl ester hydrochloride (CAS 197162-68-8), a certified reference material (molecular formula C20H23NO2HCl, MW 345.87 g/mol) for analytical method development and quality control.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, L-Leucine 9-fluorenylmethyl ester hydrochloride is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 345.87 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C20H23NO2 HCl |
| Molecular Weight | 345.87 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2013 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related L Standards
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Recommended Standards
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- 5-(2-(Pentyloxy)benzylidene)-2-(pyridin-4-yl)thiazolo[3,2-b][1,2,4]triazol-6(5H)-one (CAS 617694-61-8)
- 6-Propylchrysene (CAS 6910-41-4)
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- (5-Bromo-2-chlorophenyl)-hydrazine (CAS 98141-96-9)
- 4'-Hydroxy Atomoxetine-d3 (CAS 1217686-14-0)
- 4-Amino-3-(tetrahydro-2h-pyran-3-yl)butanoic acid (CAS 1540426-15-0)
- D-Ser32-Tirzepatide (CAS CATO-CPTD788677)
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