3-(4-Nitrophenyl)isoxazol-5(4h)-one CAS 39214-83-0
| CAS No. | 39214-83-0 |
| Molecular Formula | C9H6N2O4 |
| Molecular Weight | 206.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-(4-Nitrophenyl)isoxazol-5(4h)-one (CAS 39214-83-0) is a high-purity analytical reference standard with the molecular formula C9H6N2O4 and a molecular weight of 206.15 g/mol.
Structurally, 3-(4-Nitrophenyl)isoxazol-5(4h)-one (C9H6N2O4) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 206.15 g/mol, it falls into the medium-molecular-weight range. 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 | C9H6N2O4 |
| Molecular Weight | 206.15 g/mol |
| Appearance | Pale yellow to 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Nitrogen Atoms | 2 |
Related Nitrophenyl Standards
- 5-(2-Nitrophenyl)-1,3,4-oxadiazol-2-amine (CAS 109060-71-1)
- 3-(3-Nitrophenyl)-4,5-dihydro-1h-1,2,4-triazol-5-one (CAS 57508-55-1)
- 3-(4-Nitrophenyl)-1,2,4-oxadiazol-5-amine (CAS 23275-46-9)
- 5-(3-Nitrophenyl)-1,3,4-oxadiazol-2-amine (CAS 7659-02-1)
- 5-(4-Nitrophenyl)-1,2,4-oxadiazol-3-amine (CAS 23275-50-5)
- 5-(4-Nitrophenyl)-1,3,4-oxadiazol-2-amine (CAS 51891-79-3)
- 1-(4-Nitrophenyl)-2-pyrrolidinone (CAS 13691-26-4)
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Recommended Standards
- 3-(4-Chloro-3-methylphenyl)-1,1-dimethylurea (CAS 28170-64-1)
- 3,4-Dihydroxy-5-(1,2,3-trihydroxypropyl)furan-2(5H)-one (CAS 26566-39-2)
- 3-(1,3-Benzodioxol-5-yl)-1,2,4-oxadiazol-5-ol (CAS 931358-03-1)
- 3-Amino-6-nitro-2H-chromen-2-one (CAS 79892-85-6)
- 3-Ethoxy-1-(thiophen-3-yl)prop-2-en-1-one (CAS 1344792-10-4)
- 2-Amino-N-(2-amino-2-oxoethyl)acetamide hydrochloride (CAS 16438-42-9)
- Isograndifoliol (CAS 1445475-53-5)
- Ilaprazole Impurity 225 (CAS CATO-C4X-1130225)
- Tert-butyl 4-(4-aminobutanoyl)piperazine-1-carboxylate (CAS 1018497-49-8)
- Dimethyl((4-nitrobenzyl)imino)-lambda6-sulfanone (CAS 2384475-72-1)
- 4-Cyano-3-fluorophenylboronic Acid (CAS 843663-18-3)
- Tert-butyl 1,4,9-triazaspiro[5.5]Undecane-9-carboxylate (CAS 2382884-86-6)
- (1-Cyclopropyl-1H-1,2,3-triazol-4-yl)(piperazin-1-yl)methanone hydrochloride (CAS 2137879-53-7)
- Pancreatic Polypeptide (31-36), amide, human (CAS 74012-13-8)
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