Z-Leu-ONp CAS 1738-87-0
| CAS No. | 1738-87-0 |
| Molecular Formula | C20H22N2O6 |
| Molecular Weight | 386.41 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 386.41 g/mol gives Z-Leu-ONp distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Z-Leu-ONp (CAS 1738-87-0), a certified reference material (molecular formula C20H22N2O6, MW 386.41 g/mol) for analytical method development and quality control.
Based on its molecular formula C20H22N2O6, Z-Leu-ONp contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 386.41 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C20H22N2O6 |
| Molecular Weight | 386.41 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
Recommended Standards
- Cinacalcet Impurity 99 (CAS CATO-C4X-105999)
- 2-((1,1-Dioxidotetrahydrothiophen-3-yl)amino)-2-oxoethyl 2-(1,3-dioxooctahydro-2H-isoindol-2-yl)acetate (CAS 1005057-81-7)
- N-Nitroso Cinacalcet Impurity 5 (CAS CATO-C4X-105976)
- 1-(2-(Indol-3-yl)-acetyl)-4-(4-toluenesulfonyl)semicarbazide (CAS 1024572-88-0)
- (S)-(+)-N-3-Benzylnirvanol (CAS 790676-40-3)
- Isopropylparaben (CAS 4191-73-5)
- 3,5-Dicyclopropyl-1H-pyrazole (CAS 1288339-30-9)
- 2-Bromo-N-[4-(3-phenylpropoxy)phenyl]acetamide (CAS 1138442-41-7)
- Lenalidomide Impurity 32 (CAS CATO-C4X-190332)
- 3-(4-Methoxy-3-(trifluoromethyl)phenyl)propanoic acid (CAS 1005205-20-8)
- tert-Butyl 3,5-dioxo-2,9-diazaspiro[5.5]undecane-9-carboxylate (CAS 1245917-55-8)
- 7-Methyl-2-(methylthio)-7H-purin-6-amine (CAS 102169-59-5)
- 2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-amine (CAS 885275-16-1)
- Tirzepatide Impurity 26 X TFA Salt (CAS CATO-C4X-324026)
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