Z-Arg(Tos)-OH CAS 13650-38-9
| CAS No. | 13650-38-9 |
| Molecular Formula | C21H26N4O6S |
| Molecular Weight | 462.51 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Z-Arg(Tos)-OH is closely related to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies Z-Arg(Tos)-OH (CAS 13650-38-9), a certified reference material (molecular formula C21H26N4O6S, MW 462.51 g/mol) for analytical method development and quality control.
Z-Arg(Tos)-OH (C21H26N4O6S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C21H26N4O6S |
| Molecular Weight | 462.51 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°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.) | 1960 |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Recommended Standards
- Fluocinolone Acetonide Impurity 45 (CAS 39987-51-4)
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- 2-(4'-(3-Methyl-4-(phenylmethylsulfonamido)isoxazol-5-yl)-[1,1'-biphenyl]-4-yl)acetic acid (CAS 1423683-53-7)
- 3-(2-Hydroxyacetyl)benzonitrile (CAS 83112-50-9)
- Ginsenosidero (CAS 34367-04-9)
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- Promestriene Impurity 14 (CAS CATO-C4X-220514)
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- 1-Isopentyl-3-(trifluoromethyl)pyrazole-4-boronic acid (CAS 2377609-86-2)
- Ethyl 2-((2-oxo-2h-chromen-7-yl)oxy)acetate (CAS 72000-18-1)
- Semaglutide impurity 250 (CAS CATO-C4X-2226250)
Why CATO?
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