Fmoc-Cys-NH? CAS 623177-62-8
| CAS No. | 623177-62-8 |
| Molecular Formula | C18H18N2O3S |
| Molecular Weight | 342.41 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 342.41 g/mol gives Fmoc-Cys-NH? distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Fmoc-Cys-NH? (CAS 623177-62-8), molecular formula C18H18N2O3S and molecular weight 342.41 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C18H18N2O3S, Fmoc-Cys-NH? contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 342.41 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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 | C18H18N2O3S |
| Molecular Weight | 342.41 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°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 |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Fmoc Standards
- Fmoc-3-Fluoroalanine-2-d<SUB>1</SUB> (CAS 1217451-08-5)
- Fmoc-D-Cysteine (CAS 157355-80-1)
- Fmoc-L-Cysteine (CAS 135248-89-4)
- Fmoc-O-methyl-L-serine (CAS 159610-93-2)
- Fmoc-DL-homoserine (CAS 161125-35-5)
- Fmoc-L-homoserine (CAS 172525-85-8)
- 2-[2-(Fmoc-amino)ethoxy]acetic Acid (CAS 260367-12-2)
- Fmoc-2-amino-3-methoxypropionic acid (CAS 215189-51-8)
Recommended Standards
- Magnoflorine (CAS 2141-09-5)
- N-(6-((2-(Indolin-1-yl)-2-oxoethyl)thio)pyridazin-3-yl)propionamide (CAS 1021061-16-4)
- Phellodendrine (CAS 6873-13-8)
- N-(2-(4-(Pyrrolidin-1-yl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)thiophene-2-carboxamide (CAS 1021061-55-1)
- 1-((2-Chlorothiazol-5-yl)methyl)-N-methylpiperidin-4-amine hydrochloride (CAS 1420852-85-2)
- [(1S,6S)-6-(hydroxymethyl)cyclohex-3-en-1-yl]methanol (CAS 15679-27-3)
- 3-(Benzyloxy)azetidine (CAS 897086-95-2)
- 1-Isocyano-2,4-dimethoxybenzene (CAS 1984-21-0)
- 3-Methyl-N-(piperidin-4-yl)-1,2,4-thiadiazol-5-amine (CAS 1480597-39-4)
- Tert-butyl (3-methacrylamidopropyl)carbamate (CAS 219739-79-4)
- 1-(3-Hydroxyprop-1-yn-1-yl)cyclopentan-1-ol (CAS 6050-33-5)
- N-(Benzo[d][1,3]dioxol-5-yl)-2-bromo-2-methylpropanamide (CAS 887574-00-7)
- 1,6-Dihydro-1-(1-methyl-1H-pyrazol-4-yl)-6-oxo-3-pyridinecarboxylic acid (CAS 1251286-52-8)
- Semaglutide Impurity 137 (x TFA Salt) (CAS CATO-C4X-2226137)
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