5-Nitrobenzo[d]isoxazol-3-ol CAS 36238-80-9
| CAS No. | 36238-80-9 |
| Molecular Formula | C7H4N2O4 |
| Molecular Weight | 180.12 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-Nitrobenzo[d]isoxazol-3-ol (CAS 36238-80-9), a certified reference material (molecular formula C7H4N2O4, MW 180.12 g/mol) for analytical method development and quality control.
The molecular framework of 5-Nitrobenzo[d]isoxazol-3-ol (C7H4N2O4) 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 | C7H4N2O4 |
| Molecular Weight | 180.12 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, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
| Nitrogen Atoms | 2 |
Related Nitrobenzo Standards
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- 5-Nitrobenzo[d]isoxazol-6-ol (CAS 2092501-37-4)
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Recommended Standards
- 5-nitro-3,7-dihydropyrrolo[2,3-d]pyrimidin-4-one (CAS 22277-00-5)
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- 5-Oxo-1,5-dihydro-[1,2,4]triazolo[4,3-a]pyrimidine-6-carboxylic acid (CAS 880451-11-6)
- 5-Nitro-1h-1,2,3-benzotriazol-1-ol (CAS 64352-55-2)
- 1-(6-(4-Isopropylpiperazin-1-yl)-5-methylpyridin-3-yl)propan-1-amine (CAS 1355236-52-0)
- (1S,4S)-2-oxa-5-azabicyclo[2.2.2]octane;hydrochloride (CAS 2306249-59-0)
- 5-Bromo-2,3-difluoro-4-ethoxyphenol (CAS 2271443-08-2)
- (9H-Fluoren-9-yl)methyl (1-amino-1-oxobutan-2-yl)carbamate (CAS 339077-44-0)
- 3-(Dimethylamino)-2-isopropylphenol (CAS 1243362-76-6)
- 3-Isopropylpiperidine (CAS 13603-18-4)
- N-(3,4-Dimethylphenyl)-5-oxoprolinamide (CAS 302809-22-9)
- 8-Amino-1,4-dioxaspiro[4.5]decane-8-carboxylic acid hydrochloride (CAS 2378557-77-6)
- 3-(m-Tolyl)-1H-indazol-5-amine (CAS 1175793-77-7)
- (Leu31,Pro3?)-Neuropeptide Y (porcine) trifluoroacetate salt (CAS 125580-28-1)
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