Tryptophan EP Impurity L Diethylamine CAS CATO-C4X-137330
| CAS No. | CATO-C4X-137330 |
| Molecular Formula | C21H19N3O2 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Tryptophan EP Impurity L Diethylamine (CAS CATO-C4X-137330), a pharmacopoeial impurity reference standard (molecular formula C21H19N3O2C4H11N, MW 418.54 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Tryptophan EP Impurity L Diethylamine (C21H19N3O2C4H11N) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 13.0, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 418.54 g/mol, it falls into the moderately-high-molecular-weight range. 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.
Physical & Chemical Properties
| Molecular Formula | C21H19N3O2 C4H11N |
| Molecular Weight | 418.54 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 4 |
Related Tryptophan Standards
- Tryptophan Impurity 44 (CAS 101948-12-3)
- L-Tryptophan tert-Butyl Ester HCl (CAS 115692-31-4)
- D-Tryptophan-2′,4′,5′,6′,7′-d5 (indole-d5) (CAS 1202359-57-6)
- Tryptophan Metabolite (HIAA-d5) (CAS 1219802-93-3)
- DL-Tryptophan-d8 (CAS 1233395-85-1)
- Tryptophan Impurity 7 (CAS 13081-15-7)
- Tryptophan EP Impurity A (CAS 132685-02-0)
- Tryptophan EP Impurity A 2HCl (CAS 132685-02-0（free base）)
Recommended Standards
- Atomoxetine Impurity 32 (CAS CATO-C4X-155032)
- Baclofen impurity 45 (CAS CATO-C4X-101245)
- Cisatracurium Besilate EP Impurity Q Besylate (CAS CATO-C4X-1850121)
- Pomalidomide Impurity 17 (CAS 1377838-49-7)
- 3-(2,3-Dihydroimidazo[2,1-b]thiazol-6-yl)aniline (CAS 1105195-14-9)
- 2-(1H-Imidazol-2-yl)-3H-imidazo[4,5-c]pyridine (CAS 2578957-63-6)
- 2-(1h-Pyrrol-3-yl)ethan-1-amine (CAS 73625-09-9)
- 2-Amino-6-(difluoromethyl)-5-methoxynicotinic acid (CAS 1805982-73-3)
- Ibogaine (CAS 83-74-9)
- Palmitoyl hexapeptide-6 (CAS 891498-01-4)
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