Isoxazol-3-ylmethyl methanesulfonate CAS 2144668-08-4
| CAS No. | 2144668-08-4 |
| Molecular Formula | C5H7NO4S |
| Molecular Weight | 177.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Isoxazol-3-ylmethyl methanesulfonate (C5H7NO4S) is characterized by a carbohydrate-derived structure, an amide group, a sulfone group. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Isoxazol-3-ylmethyl methanesulfonate (CAS 2144668-08-4), molecular formula C5H7NO4S and molecular weight 177.18 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C5H7NO4S |
| Molecular Weight | 177.18 g/mol |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1997 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Isoxazol Standards
- 5-(Isoxazol-3-yl)thiophene-2-carbonitrile (CAS 175205-67-1)
- 1-(Isoxazol-4-ylmethyl)-4-methyl-1h-pyrazol-3-amine (CAS 1339462-46-2)
- 5-(Isoxazol-5-yl)furan-2-carboxylic acid (CAS 1399654-32-0)
- 2-isoxazol-5-yl-4-methylphenol (CAS 104516-57-6)
- (2-(Isoxazol-3-yl)phenyl)methanol (CAS 1823367-17-4)
- (4-(Isoxazol-3-yl)phenyl)methanol (CAS 1823887-39-3)
- (3-(Isoxazol-3-yl)phenyl)methanol (CAS 1823898-86-7)
- 5-(Isoxazol-3-yl)oxazole-4-carboxylic Acid (CAS 1250404-35-3)
Recommended Standards
- 8-Fluoro-6-methoxyquinoline (CAS 209353-21-9)
- Methyl 2-(cyanomethanesulfonyl)acetate (CAS 214691-87-9)
- 8-Fluoro-5-methoxyquinoline (CAS 887769-93-9)
- N-(4-Fluorophenyl)-1H-pyrazol-4-amine (CAS 2060046-15-1)
- Tert-butyl (2S,4S)-2-(aminomethyl)-4-methylpyrrolidine-1-carboxylate (CAS 1932233-40-3)
- Benzyl 7-hydroxyimidazo[1,2-a]pyridine-8-carboxylate (CAS 2202789-40-8)
- Enoximone (CAS 77671-31-9)
- 1-([2,4'-Bipiperidin]-1-yl)-2-(2-fluorophenyl)ethan-1-one (CAS 1316217-38-5)
- 3-((2-(Piperidin-1-yl)thiazol-5-yl)methylene)indolin-2-one (CAS 860784-41-4)
- (3-((2-Methoxybenzyl)oxy)phenyl)boronic acid (CAS 1072952-02-3)
- 22-beta-Hydroxy Cholesterol (CAS 22348-64-7)
- Methyl 1-(2-bromobenzyl)piperidine-4-carboxylate (CAS 1057273-26-3)
- Tert-butyl 7-chloro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indole-1-carboxylate (CAS 1218790-31-8)
- Peptide-GMF (CAS CATO-CPTD788469)
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