(R)-2-Amino-2-(5-oxo-2,5-dihydroisoxazol-4-yl)acetic acid CAS 130645-62-4
| CAS No. | 130645-62-4 |
| Molecular Formula | C5H6N2O4 |
| Molecular Weight | 158.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(R)-2-Amino-2-(5-oxo-2,5-dihydroisoxazol-4-yl)acetic acid (C5H6N2O4) contains a carbohydrate-derived structure, an amide group. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
(R)-2-Amino-2-(5-oxo-2,5-dihydroisoxazol-4-yl)acetic acid (CAS 130645-62-4) is a high-purity analytical reference standard with the molecular formula C5H6N2O4 and a molecular weight of 158.11 g/mol.
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 | C5H6N2O4 |
| Molecular Weight | 158.11 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1994 |
| Nitrogen Atoms | 2 |
Related R Standards
- (S)-2-Amino-2-(5-oxo-2,5-dihydroisoxazol-4-yl)acetic acid (CAS 130620-57-4)
- (R)-2-Amino-2-(3-oxo-2,3-dihydroisoxazol-5-yl)acetic acid (CAS 25690-46-4)
- (S)-2-Amino-2-(3-oxo-2,3-dihydroisoxazol-5-yl)acetic acid (CAS 25690-45-3)
- 3-Amino-4-methoxyisoxazole-5-carboxylic acid (CAS 89322-97-4)
- Methyl (4-amino-1,2,5-oxadiazol-3-yl)carbamate (CAS 1256628-07-5)
- 4-Amino-3-(methylcarbamoyl)-1,2,5-oxadiazole 2-oxide (CAS 164926-70-9)
- 2-((4-Amino-1,2,5-oxadiazol-3-yl)amino)acetic acid (CAS 401647-08-3)
- 3-Amino-1H-pyrrolo[2,3-b]pyridine-4-carbonitrile (CAS 1000340-50-0)
Recommended Standards
- DL-Dihydro-Orotic Acid (CAS 155-54-4)
- 3-oxocyclobutane-1,1-dicarboxylic acid (CAS 129314-76-7)
- Methyl 2,5-dioxoimidazolidine-4-carboxylate (CAS 156514-01-1)
- 2-Methyl-4-Oxo-Pent-2-Enedioic Acid (CAS 115154-44-4)
- N-(cyclopropylmethyl)-1-(4-hydroxy-7-(p-tolyl)thieno[3,2-d]pyrimidin-2-yl)piperidine-3-carboxamide (CAS 1242867-13-5)
- 3-(4-Fluoro-5,6,7,8-tetrahydronaphthalen-1-yl)propanoic acid (CAS 2089277-27-8)
- 3-(5-Iodothiophen-3-yl)-1,4-dimethyl-1h-pyrazol-5-amine (CAS 1526536-89-9)
- 1-(2-Methoxyphenyl)quinazolin-4(1H)-one (CAS 92437-61-1)
- 2-((5-Bromopyridin-2-yl)oxy)-N,N-dimethylethanamine (CAS 212961-35-8)
- (2S,6S)-2-Allyl-6-methyl-1,2,3,6-tetrahydropyridine (CAS 1932187-90-0)
- 1019186-60-7 2-(4-Fluorophenyl)-6,6-dimethyl-3,8-dioxo-2,3,5,6,7,8-hexahydroisoquinoline-4-carboxylic acid (CAS 1019186-60-7)
- 3-((4-Chlorobenzyl)thio)-5,6-dihydrobenzo[h]cinnoline (CAS 478047-91-5)
- 6-Bromo-5-fluoro-1,2,3,4-tetrahydroquinolin-2-one (CAS 1404367-69-6)
- D-[Ser]11-Semaglutide (CAS CATO-CPTD788629)
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