L-leucyl-L-leucyl-L-valyl-L-phenylalanine CAS 24205-68-3
| CAS No. | 24205-68-3 |
| Molecular Formula | C26H42N4O5 |
| Molecular Weight | 490.64 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
L-leucyl-L-leucyl-L-valyl-L-phenylalanine (CAS 24205-68-3), molecular formula C26H42N4O5 and molecular weight 490.64 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, L-leucyl-L-leucyl-L-valyl-L-phenylalanine (C26H42N4O5) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 490.64 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C26H42N4O5 |
| Molecular Weight | 490.64 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 4 |
Related L Standards
- L-Leucyl-L-valyl-L-prolyl-L-arginine (CAS 125775-47-5)
- L-Leucyl-L-prolyl-L-leucyl-L-arginyl-L-phenylalaninamide (CAS 88280-21-1)
- DL-Leucyl-DL-phenylalanine (CAS 56217-82-4)
- L-Leucyl-L-phenylalaninamide (CAS 38678-60-3)
- D-Leucyl-D-Lysine (CAS CATO-C4X-304143)
- D-leucyl-D-leucine (CAS 38689-30-4)
- 1-(L-leucyl)piperidine-4-carboxylic acid (CAS 1308930-89-3)
- l-Leucyl-d-valine (CAS 17665-00-8)
Recommended Standards
- 2-(Hexahydro-4-methyl-1H-1,4-diazepin-1-yl)-6,7-dimethoxy-N-[1-(phenylmethyl)-4-piperidinyl]-4-quina (CAS 935693-62-2)
- N-(5-(((5-(tert-Butyl)oxazol-2-yl)methyl)thio)thiazol-2-yl)-2-(4-(((1,3-dihydroxypropan-2-yl)amino)methyl)phenyl)acetamide (CAS 333389-24-5)
- 2-((2-(4-Ethoxyphenyl)-2-oxoethyl)thio)-3-(p-tolyl)-5,6,7,8-tetrahydrobenzo[4,5]thieno[2,3-d]pyrimidin-4(3H)-one (CAS 499124-12-8)
- Gefitinib Impurity 52 (CAS CATO-C4X-111752)
- 7789-47-1 P986675T8V Mercuric bromide Mercury bromide (HgBr2) Mercury dibromide Mercury(II) bromide (1:2) EINECS 232-169-3 HSDB 829 Mercuric dibromide UNII-P986675T8V (CAS 7789-47-1)
- 2-Chloro-4-cyclopropoxy-N,N-dimethylpyridin-3-amine (CAS 1243408-75-4)
- 2-Nitro-5-thiobenzoic acid (CAS 15139-21-6)
- 1,2-Bis(4-ethylphenyl)ethyne (CAS 79135-69-6)
- 3-Methoxy-3-methylazetidine (CAS 877665-31-1)
- 7-Bromo-4-methyl-1H-indazole (CAS 1257535-46-8)
- Methyl 2-amino-2-(4-fluoro-3-methylphenyl)acetate (CAS 1249980-37-7)
- 5-Bromo-2,3-dihydroxybenzoic Acid Methyl Ester (CAS 105603-49-4)
- 4-Amino-N-ethylbenzamide (CAS 89399-17-7)
- [D-Ser8]-Semaglutide A (CAS CATO-C4X-2226116)
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