L-Leucine 4-nitrophenyl ester hydrochloride CAS 75691-76-8
| CAS No. | 75691-76-8 |
| Molecular Formula | C12H16N2O4 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), L-Leucine 4-nitrophenyl ester hydrochloride meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
L-Leucine 4-nitrophenyl ester hydrochloride (CAS 75691-76-8) is a high-purity analytical reference standard with the molecular formula C12H16N2O4HCl and a molecular weight of 288.73 g/mol.
L-Leucine 4-nitrophenyl ester hydrochloride (C12H16N2O4HCl) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C12H16N2O4 HCl |
| Molecular Weight | 288.73 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related L Standards
- L-Leucine cyclopentyl ester hydrochloride (CAS 1018674-12-8)
- L-Leucine-d10 (CAS 106972-44-5)
- L-Leucine-13C6, D10 (CAS 1217445-25-4)
- L-leucine, 4-fluoro-, ethyl ester-4h2so4py (CAS 1459196-65-6)
- L-Leucine, N-(1-oxobutyl)-, 2,5-dioxo-1-pyrrolidinyl ester (CAS 1604040-21-2)
- D-Leucine Benzyl Ester p-Methylbenzenesulfonate (CAS 17664-93-6)
- L-Leucine 9-fluorenylmethyl ester hydrochloride (CAS 197162-68-8)
- L-Leucine, L-norvalyl- (CAS 200618-44-6)
Recommended Standards
- 1-Methyl-3-phenyl-5-((3-(trifluoromethyl)phenyl)thio)-1H-pyrazole-4-carbonitrile (CAS 321998-25-8)
- Ethyl 2-(6-amino-5-chloropyridin-3-yl)acetate (CAS 1393555-10-6)
- 4-[(tert-Butoxycarbonyl)oxy]-2-methylphenol (CAS 457634-20-7)
- 1H-Benzo[d]imidazol-2(3H)-one O-methyl oxime (CAS 111667-51-7)
- 2,4-Dichloro-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one (CAS 1393572-20-7)
- Tirofiban Impurity 70 (CAS CATO-C4X-125470)
- (5,5-Dimethyl-4,5,6,7-tetrahydro-1,2-benzoxazol-3-yl)methanol (CAS 1504762-46-2)
- Norepinephrine Impurity 67 (CAS CATO-C4X-151467)
- 10-Fluorodecanoic acid (CAS 334-59-8)
- Semaglutide Impurity 131 (CAS 2618647-80-4)
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