H-Cys(aminoethyl)-OH · HCl CAS 4099-35-8
| CAS No. | 4099-35-8 |
| Molecular Formula | C5H12N2O2S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 200.68 g/mol gives H-Cys(aminoethyl)-OH · HCl distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies H-Cys(aminoethyl)-OH · HCl (CAS 4099-35-8), a certified reference material (molecular formula C5H12N2O2SHCl, MW 200.68 g/mol) for analytical method development and quality control.
The molecular framework of H-Cys(aminoethyl)-OH · HCl (C5H12N2O2SHCl) is characterized by an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C5H12N2O2S HCl |
| Molecular Weight | 200.68 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 0.0 |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Recommended Standards
- 2-(7,7-Dimethyl-1-oxo-1,3,4,6,7,8-hexahydro-2H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazin-2-yl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl acetate (CAS 1346676-30-9)
- Methyl (2S,4S)-4-[4-(tert-pentyl)phenoxy]-2-pyrrolidinecarboxylate (CAS 1217855-44-1)
- Ethyl 3-amino-5-(3-bromophenyl)thiophene-2-carboxylate (CAS 1094398-56-7)
- (S)-1-(Ethylamino)-2-propanol Hydrochloride (CAS 1807940-46-0)
- tert-Butyl (S)-3-(Boc-amino)-4-bromobutanoate (CAS 2006286-94-6)
- (6S,8aS)-octahydroindolizin-6-amine (CAS 132256-88-3)
- γ2-MSH (CAS 72711-43-4)
- 3-Ethynylisonicotinaldehyde (CAS 1196153-32-8)
- Rel-(1R,2R)-1-methylcyclohexane-1,2-diol (CAS 19534-08-8)
- Semaglutide impurity 54 (CAS CATO-C4X-222654)
Why CATO?
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