Tryptophan impurity 31 CAS 2591-98-2
| CAS No. | 2591-98-2 |
| Molecular Formula | C10H9NO |
| Molecular Weight | 159.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Tryptophan impurity 31 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
As a process- or degradation-related impurity, Tryptophan impurity 31 (CAS 2591-98-2, C10H9NO) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Tryptophan impurity 31 (C10H9NO) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility; 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).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
Physical & Chemical Properties
| Molecular Formula | C10H9NO |
| Molecular Weight | 159.18 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Tryptophan Standards
Recommended Standards
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- Orlistat Impurity 7 (CAS 6113-61-7)
- Fluorometholone Impurity 5 (CAS 378-36-9)
- Cefazolin EP Impurity B (CAS 2384108-14-7)
- Azacitidine Impurity 10 (CAS CATO-C4X-138810)
- 3-Chloro-1H-indazol-4-ol (CAS 1246307-72-1)
- Ethyl (5-amino-1H-1,2,4-triazole-1-carbonyl)carbamate (CAS 41995-97-5)
- Ibuprofen Impurity 54 (CAS 158264-26-7)
- Potassium trifluoro(naphthalen-2-ylmethyl)borate (CAS 1632070-89-3)
- Methyl 4-amino-2,5-dimethylbenzoate (CAS 21339-74-2)
- 1-Fluoro-3-oxocyclobutane-1-carbonitrile (CAS 2231677-14-6)
- Neuropeptide Y (3-36) (porcine) trifluoroacetate salt (CAS 143863-88-1)
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