5-nitro-1,3-benzoxazole-2-carbonitrile CAS 35699-00-4
| CAS No. | 35699-00-4 |
| Molecular Formula | C8H3N3O3 |
| Molecular Weight | 189.13 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.
CATO supplies 5-nitro-1,3-benzoxazole-2-carbonitrile (CAS 35699-00-4), a certified reference material (molecular formula C8H3N3O3, MW 189.13 g/mol) for analytical method development and quality control.
The molecular framework of 5-nitro-1,3-benzoxazole-2-carbonitrile (C8H3N3O3) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. 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. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C8H3N3O3 |
| Molecular Weight | 189.13 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
| Nitrogen Atoms | 3 |
Related nitro Standards
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Recommended Standards
- 4-Methyl-6-(trifluoromethyl)picolinaldehyde (CAS 615580-37-5)
- 6-Methyl-4-(trifluoromethyl)picolinaldehyde (CAS 451459-25-9)
- 4-Amino-2-(trifluoromethyl)benzaldehyde (CAS 876322-73-5)
- 6-Nitrobenzo[d]isoxazole-3-carbonitrile (CAS 343945-78-8)
- 2-Amino-5-chloro-3-nitrobenzoic acid (CAS 6324-51-2)
- 3-(3-Aminophenoxy)propan-1-ol (CAS 121486-70-2)
- 2-Hydrazinyl-4-(5-methylfuran-2-yl)pyrimidine (CAS 1410821-14-5)
- Ethyl 2,4-dibromo-3,6-difluorophenylacetate (CAS 1803715-63-0)
- 1-(5-(4-Chlorophenyl)-2-methyl-1-phenyl-1H-pyrrol-3-yl)ethanone (CAS 100989-43-3)
- 7,8-difluoro-2,3,4,5-tetrahydro-1H-1,5-benzodiazepine (CAS 1354953-55-1)
- Methyl 1-Aminocyclopentanecarboxylate Hydrochloride (CAS 60421-23-0)
- 5-Bromopyrazine-2-carboxamide (CAS 36070-84-5)
- 2,4-Dimethoxy-5-nitrobenzaldehyde (CAS 6468-19-5)
- Tirzepatide Impurity 47 (CAS CATO-C4X-324047)
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