5-Cyclopentylisoxazole-3-carboxylic Acid CAS 908856-67-7
| CAS No. | 908856-67-7 |
| Molecular Formula | C9H11NO3 |
| Molecular Weight | 181.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Cyclopentylisoxazole-3-carboxylic Acid is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 5-Cyclopentylisoxazole-3-carboxylic Acid (CAS 908856-67-7), a certified reference material (molecular formula C9H11NO3, MW 181.19 g/mol) for analytical method development and quality control.
Based on its molecular formula C9H11NO3, 5-Cyclopentylisoxazole-3-carboxylic Acid contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 181.19 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
CATO manufactures 5-Cyclopentylisoxazole-3-carboxylic Acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H11NO3 |
| Molecular Weight | 181.19 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 |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 1 |
Related Cyclopentylisoxazole Standards
Recommended Standards
- 5-Amino-2-methoxy-4-methylbenzoic acid (CAS 70752-50-0)
- 5-Ethyl-3-hydroxy-6-methylpyrazine-2-carboxamide (CAS 440124-21-0)
- 5-Amino-2-(dimethylamino)isonicotinic acid (CAS 202273-07-2)
- 5-Ethynylisoquinoline-4-carbaldehyde (CAS 2920713-07-9)
- 4-Fluoro-1H-pyrrolo[3,2-c]pyridine-3-carbonitrile (CAS 2231675-19-5)
- tert-Butyl 4-(2-chloroacetyl)-1,4-diazepane-1-carboxylate (CAS 722537-49-7)
- 5-Hydroxypentanal (CAS 4221-03-8)
- 6-Bromo-3-fluoro-2-iodopyridine (CAS 1807008-77-0)
- 3,4-Dihydro-1H-benzo[d][1,2]thiazine 2,2-dioxide (CAS 33183-87-8)
- MMP-2/MMP-9 Substrate I, Fluorogenic (CAS 135662-07-6)
- N-(4-Methoxyphenyl)-6-(methylthio)benzo[d]thiazol-2-amine (CAS 890960-33-5)
- 4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethoxy)pyridine (CAS 1356832-52-4)
- 2-Bromo-6-Nitrobenzaldehyde (CAS 20357-21-5)
- Glucagon (1-29) (CAS 16941-32-5)
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