4-Aminobenzoxazole-2(3H)-one CAS 81900-93-8
| CAS No. | 81900-93-8 |
| Molecular Formula | C7H6N2O2 |
| Molecular Weight | 150.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 4-Aminobenzoxazole-2(3H)-one (C7H6N2O2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 150.13 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
4-Aminobenzoxazole-2(3H)-one (CAS 81900-93-8) is a high-purity analytical reference standard with the molecular formula C7H6N2O2 and a molecular weight of 150.13 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C7H6N2O2 |
| Molecular Weight | 150.13 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 DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
| Nitrogen Atoms | 2 |
Related Aminobenzoxazole Standards
- 2-Aminobenzoxazole-6-carbaldehyde (CAS 1806340-60-2)
- 6-Aminobenzoxazole-2-methanamine (CAS 1524800-87-0)
- 4-Aminobenzoxazole-2-methanamine (CAS 1551033-41-0)
- 5-Aminobenzoxazole-2-methanamine (CAS 1780283-55-7)
- 4-Aminobenzoxazole (CAS 163808-09-1)
- 6-Aminobenzoxazole (CAS 177492-52-3)
- 5-Aminobenzoxazole (CAS 63837-12-7)
- 5-Aminobenzoxazole-2-thiol (CAS 24316-85-6)
Recommended Standards
- 4-Amino-3,3-difluoro-1-methylpyrrolidin-2-one (CAS 2167553-04-8)
- 4-Ethynyl-1-methyl-1H-pyrazole-5-carboxylic acid (CAS 79229-66-6)
- 3-Oxo-3-(pyrazin-2-yl)propanal (CAS 942223-92-9)
- 4-Hydroxy-2,3-dihydro-1h-1,3-benzodiazol-2-one (CAS 69053-50-5)
- Tert-butyl (3S,4R)-4-(benzylamino)-3-fluoropiperidine-1-carboxylate (CAS 907572-24-1)
- (S)-7-Amino-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (CAS 236429-63-3)
- 4-(3-Methoxyphenyl)-6-oxo-2-phenyl-1,6-dihydropyrimidine-5-carbonitrile (CAS 338982-08-4)
- 2-(tert-Butyl)-6-methylpyridine (CAS 6831-86-3)
- 3-(Hexadecylamino)propanohydrazide (CAS 1040689-30-2)
- 1-Methyl-4-(5-methyl-4-(2-(piperidin-1-yl)ethyl)-4H-1,2,4-triazol-3-yl)-1H-pyrazol-5-amine (CAS 957010-46-7)
- Trimebutine EP Impurity B/Trimethoprim EP Impurity J (CAS 118-41-2)
- 3-Amino-N-methylisoxazole-4-carboxamide (CAS 207913-23-3)
- 3-Methyl-4,5-dihydroisoxazole-5-carbonitrile (CAS 86260-83-5)
- Tau Peptide (306-317) trifluoroacetate salt (CAS 1003007-59-7)
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