N-Carbobenzoxy-S-Phenyl-L-Cysteine Methyl Ester CAS 153277-33-9
| CAS No. | 153277-33-9 |
| Molecular Formula | C18H19NO4S |
| Molecular Weight | 345.41 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
N-Carbobenzoxy-S-Phenyl-L-Cysteine Methyl Ester (C18H19NO4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
CATO supplies N-Carbobenzoxy-S-Phenyl-L-Cysteine Methyl Ester (CAS 153277-33-9), a certified reference material (molecular formula C18H19NO4S, MW 345.41 g/mol) for analytical method development and quality control.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C18H19NO4S |
| Molecular Weight | 345.41 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2000 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related N Standards
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- N6-Carbobenzoxy-DL-lysine N-Carboxyanhydride (CAS 10289-12-0)
- N-Carbobenzoxy-L-proline tert-Butyl Ester (CAS 16881-39-3)
- N-Carbobenzoxy-4-hydroxy-D-2-phenylglycine (CAS 26787-75-7)
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- N-Carbobenzoxy-DL-norleucine (CAS 15027-13-1)
Recommended Standards
- 2-Fluoro-N-((5-(thiophene-2-carbonyl)thiophen-2-yl)methyl)benzamide (CAS 1421525-86-1)
- Methyl 2-(7-(furan-2-yl)-1,4-thiazepane-4-carbonyl)benzoate (CAS 1706300-76-6)
- S-(2-Benzoyl-4,5-dimethoxyphenyl) dimethylcarbamothioate (CAS 1332584-18-5)
- 2-Fluoro-N-((5-(thiophene-3-carbonyl)thiophen-2-yl)methyl)benzamide (CAS 1797600-45-3)
- 2-(chloromethyl)-6-ethylpyrimidin-4-ol (CAS 344294-25-3)
- 3-(4-(2-Hydroxybenzoyl)-1h-pyrazol-1-yl)benzoic acid (CAS 959575-06-5)
- Methyl 7-methoxyimidazo[1,2-a]pyridine-3-carboxylate (CAS 1263281-53-3)
- tert-Butyl (3S)-3-(aminomethyl)-3-fluoropyrrolidine-1-carboxylate (CAS 1601461-44-2)
- Methyl (R)-1-Boc-4-Cbz-piperazine-2-carboxylate (CAS 278790-00-4)
- Cefuroxime Impurity 59 (CAS CATO-C4X-124559)
- 2-(Difluoromethoxy)-4-methylaniline hydrochloride (CAS 1431962-99-0)
- 2-[(Ethanesulfonyl)methyl]benzonitrile (CAS 1267101-21-2)
- 3-(3-Iodophenyl)-4-methyl-1h-pyrazol-5-amine (CAS 2145467-70-3)
- Semaglutide Impurity 125 xTFA Salt (CAS CATO-C4X-2226125)
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