3-(3-Nitrophenyl)-1,2,4-oxadiazole CAS 90049-83-5
| CAS No. | 90049-83-5 |
| Molecular Formula | C8H5N3O3 |
| Molecular Weight | 191.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
3-(3-Nitrophenyl)-1,2,4-oxadiazole (CAS 90049-83-5), molecular formula C8H5N3O3 and molecular weight 191.14 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C8H5N3O3, 3-(3-Nitrophenyl)-1,2,4-oxadiazole 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 191.14 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.
Physical & Chemical Properties
| Molecular Formula | C8H5N3O3 |
| Molecular Weight | 191.14 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.) | 1982 |
| Nitrogen Atoms | 3 |
Related Nitrophenyl Standards
- 3-(4-Nitrophenyl)-1,2,4-oxadiazole (CAS 16013-14-2)
- 2-(2-Nitrophenyl)-1,3,4-oxadiazole (CAS 89898-92-0)
- 2-(3-Nitrophenyl)-1,3,4-oxadiazole (CAS 5565-72-0)
- 2-(4-Nitrophenyl)-1,3,4-oxadiazole (CAS 4291-13-8)
- 3-(2-Nitrophenyl)propiolic acid (CAS 530-85-8)
- 3-(3-Nitrophenyl)propiolic acid (CAS 4996-15-0)
- 3-(4-Nitrophenyl)-1,2,5-oxadiazole (CAS 58749-72-7)
- 3-(4-Nitrophenyl)propiolic acid (CAS 2216-24-2)
Recommended Standards
- 2-Oxo-2H-pyrimido[1,2-b]pyridazine-4-carboxylic acid (CAS 30247-69-9)
- 2-Oxo-1,2-dihydropyrido[2,3-b]pyrazine-3-carboxylic acid (CAS 91997-11-4)
- 2-Nitro-1h-indene-1,3(2h)-dione (CAS 3674-33-7)
- 3-Nitro-1,5-naphthyridin-2(1H)-one (CAS 64222-33-9)
- N4,N4-Dimethyl-5-nitropyrimidine-4,6-diamine (CAS 6311-26-8)
- Clindamycin 2,3-Dipalmitate HCl (CAS CATO-C4X-1341136)
- 3-Fluoro-N-(4-(4-methoxyphenyl)-5-methylthiazol-2-yl)benzamide (CAS 536733-55-8)
- (2R,3S)-2-(pyridin-4-yl)tetrahydrofuran-3-amine (CAS 1808470-12-3)
- 1,3-Dibromo-2-(methoxymethoxy)-benzene (CAS 142273-81-2)
- 9008-02-0 VSU9IB86SP Deoxyhemoglobin Hemoglobins UNII-VSU9IB86SP (CAS 9008-02-0)
- 7-Bromo-3-chloroquinoline (CAS 1246549-62-1)
- Ethyl 4-bromo-1-ethyl-1H-pyrrole-2-carboxylate (CAS 1480555-35-8)
- 2-Chloro-6-cyclopropoxybenzonitrile (CAS 1243470-25-8)
- Semaglutide impurity 75 (CAS CATO-C4X-222675)
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