Tryptophan EP Impurity L CAS 287170-99-4
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 287170-99-4 |
| Molecular Formula | C21H19N3O2 |
| Molecular Weight | 345.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Tryptophan EP Impurity L (CAS 287170-99-4) is a high-purity pharmacopoeial impurity standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C21H19N3O2. Molecular weight: 345.39 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C21H19N3O2 |
| Molecular Weight | 345.39 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 3 |
Related Tryptophan Standards
- Tryptophan EP Impurity K (CAS 149724-31-2)
- Tryptophan Impurity 15 (CAS 180509-18-6)
- Tryptophan Impurity 9 (CAS 141215-69-2)
- Tryptophan impurity 42 (CAS CATO-C4X-137342)
- Tryptophan impurity 41 (CAS CATO-C4X-137341)
- Tryptophan EP Impurity J (CAS 164068-19-3)
- D-Tryptophan benzyl ester (CAS 141595-98-4)
- Tryptophan impurity 32 (CAS 2306500-74-1)
Recommended Standards
- Isofenphos (CAS 25311-71-1)
- Ac-Lys-AMC (CAS 156661-42-6)
- Isatin Bis-cresol (CAS 47465-97-4)
- Ticagrelor Nitroso EP Impurity B (CAS CATO-C4X-1093164)
- Caspofungin EP Impurity A acetate (CAS CATO-C4X-157539)
- Biotinyl-Neuropeptide W-23 (human) (CAS 1815618-09-7)
- Methyl 2-amino-3-bromo-5-chlorobenzoate (CAS 101080-36-8)
- 2,6-Diamino-4-(pyridin-3-yl)-4H-thiopyran-3,5-dicarbonitrile (CAS 125219-61-6)
- Rubidium hydroxide hydrate (CAS 12026-05-0)
- Osteoblast-Adhesive Peptide (CAS 193613-75-1)
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 13829788188 / jacky.chen@cato-chem.com