Lysine Impurity 25 CAS 121893-23-0
| CAS No. | 121893-23-0 |
| Molecular Formula | C13H18N2O4 |
| Molecular Weight | 266.29 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Lysine Impurity 25 (C13H18N2O4) 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. 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).
CATO supplies Lysine Impurity 25 (CAS 121893-23-0), a pharmacopoeial impurity reference standard (molecular formula C13H18N2O4, MW 266.29 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
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 | C13H18N2O4 |
| Molecular Weight | 266.29 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 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 2 |
Related Lysine Standards
- Dl-Lysine Acetylsalicylate EP Impurity H (CAS CATO-C4X-22113)
- Dl-Lysine Acetylsalicylate EP Impurity J (CAS CATO-C4X-22115)
- 82277-17-6 L-Lysine, N6-[(cyclopentyloxy)carbonyl]- (CAS 82277-17-6)
- Dl-Lysine Acetylsalicylate EP Impurity C (CAS 2924449-37-4)
- Lysine Impurity 39 (CAS 94613-75-9)
- Lysine Impurity 40 (CAS CATO-C4X-221140)
- Dl-Lysine Acetylsalicylate EP Impurity G (CAS CATO-C4X-221138)
- Lysine Impurity 7 (Ac-DL-Lys(Ac)-OH) (CAS 35436-74-9)
Recommended Standards
- Troxipide Impurity 28 (CAS CATO-C4X-214828)
- Troxipide Impurity 19 (CAS CATO-C4X-214819)
- Selexipag Impurity 9 (CAS CATO-C4X-19619)
- Benzbromarone EP Impurity C (CAS 1477-19-6)
- Ertugliflozin impurity 56 (CAS CATO-C4X-301156)
- Prednisolone impurity 63 (CAS 23674-85-3)
- Meropenem Impurity 32 (CAS CATO-C4X-130932)
- 2-(4-bromo-1H-1,3-benzodiazol-2-yl)ethan-1-amine (CAS 4507-68-0)
- methyl 2-ethyl-5-nitrobenzoate (CAS 103205-48-7)
- 3-Bromo-2,6-dimethyl-4-nitropyridine (CAS 76591-67-8)
- n-Butyl-6-chloro-n-methylpyrazin-2-amine (CAS 1219961-33-7)
- (4-((Methylsulfonyl)methyl)phenyl)(morpholino)methanone (CAS 1181033-34-0)
- 3-(2-Acetamidophenoxy)thiophene-2-carboxylic acid (CAS 900019-08-1)
- (D-Ala2)-Gastric Inhibitory Polypeptide (human) trifluoroacetate salt (CAS 444073-04-5)
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