Tryptophan Impurity 15 CAS CATO-C4X-137315
| CAS No. | CATO-C4X-137315 |
| Molecular Formula | C11H12N2O3 |
| Molecular Weight | 220.22 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Tryptophan Impurity 15 is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies Tryptophan Impurity 15 (CAS CATO-C4X-137315), a pharmacopoeial impurity reference standard (molecular formula C11H12N2O3, MW 220.22 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Tryptophan Impurity 15 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 220.22 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
CATO manufactures Tryptophan Impurity 15 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.
Physical & Chemical Properties
| Molecular Formula | C11H12N2O3 |
| Molecular Weight | 220.22 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Related Tryptophan Standards
- Tryptophan Impurity 17 (CAS 32999-55-6)
- Tryptophan EP Impurity G (CAS 21704-80-3)
- Tryptophan impurity 43 (CAS 77872-41-4)
- L-Tryptophan-13C11-15N2 (CAS 202406-50-6)
- Tryptophan EP Impurity H (CAS 6052-68-2)
- DL-Tryptophan-d8 (CAS 1233395-85-1)
- Tryptophan Cyclized Impurity (CAS 40856-80-2)
- (3S)-Tryptophan EP Impurity I (Mixture of Diastereomers) (CAS 191279-37-5)
Recommended Standards
- Gefitinib Impurity 80 (CAS CATO-C4X-111780)
- Apixaban Impurity 112 (CAS 38560-30-4)
- N-Acetyltryptophan EP Impurity D (CAS 4350-09-8)
- Hispolon (CAS 173933-40-9)
- Ammoxetine Impurity 25 (CAS CATO-C4X-224425)
- Bromopride Impurity 1 (CAS 4093-34-9)
- Minocycline Impurity 31 (CAS CATO-C4X-169931)
- Ethyl 3-(2-chloropyridin-4-yl)-3-oxopropanoate (CAS 861417-45-0)
- 2-Methoxy-4-nitrodibenzo[b,d]furan (CAS 1799912-97-2)
- N,1-Dimethyl-1-oxo-1phosphinan-4-amine (CAS 2711976-41-7)
- 3-Amino Isonicotinic Acid (CAS 7579-20-6)
- Triethoxyvanadium(V) oxide (CAS 1686-22-2)
- Ixazomib Impurity 53 (CAS CATO-C4X-126753)
- Semaglutide impurity 40 (CAS CATO-C4X-222640)
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