(S)-2-(2-(1H-Indol-3-yl)acetamido)-3-(1H-imidazol-4-yl)propanoic acid CAS 57105-49-4
| CAS No. | 57105-49-4 |
| Molecular Formula | C16H16N4O3 |
| Molecular Weight | 312.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(S)-2-(2-(1H-Indol-3-yl)acetamido)-3-(1H-imidazol-4-yl)propanoic acid (C16H16N4O3) contains a nitrogen-containing heterocyclic scaffold, an amide 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
(S)-2-(2-(1H-Indol-3-yl)acetamido)-3-(1H-imidazol-4-yl)propanoic acid (CAS 57105-49-4), molecular formula C16H16N4O3 and molecular weight 312.32 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C16H16N4O3 |
| Molecular Weight | 312.32 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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.) | 1973 |
| Nitrogen Atoms | 4 |
Recommended Standards
- (E)-N'-(2-ethoxybenzylidene)benzo[d][1,3]dioxole-5-carbohydrazide (CAS 342001-81-4)
- (S)-9-Hydroxy-8-methoxy-1-methyl-1,4,12a,13-tetrahydro-6H-benzo[e]imidazo[4',5':4,5]pyrido[1,2-a][1,4]diazepin-6-one (CAS 2417368-20-6)
- (E)-7-Hydroxy-8-methoxy-3-(4-methoxybenzylidene)chroman-4-one (CAS 90996-27-3)
- (S)-N-((3-([3,4'-Bipyridin]-6-yl)-2-oxooxazolidin-5-yl)methyl)acetamide (CAS 225644-82-6)
- 3-Hydroxy-2,2-dimethylpropyl 4-methylbenzenesulfonate (CAS 21651-04-7)
- 2-bromo-3H-imidazo[4,5-c]pyridine (CAS 1557344-85-0)
- 1-Acetyl-7-chloro-2,3-dihydroquinolin-4(1H)-one (CAS 26413-49-0)
- 1-(4-Chlorophenyl)-6,7-dimethoxy-3,4-dihydroisoquinoline (CAS 76201-90-6)
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- Potassium (4-aminophenyl)trifluoroborate (CAS 1386231-56-6)
- N-methyl-1-(2-(piperidin-1-ylmethyl)phenyl)methanamine (CAS 920462-26-6)
- 3,3-Dimethyl-[1,1-biphenyl]-4,4-dicarboxylic acid (CAS 63297-02-9)
- 1-Bromo-4-(difluoromethyl)-2-(trifluoromethoxy)benzene (CAS 2167351-62-2)
- Semaglutide impurity 197 (CAS CATO-C4X-2226197)
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