4-Nitroisoxazol-5(2H)-one CAS 145440-80-8
| CAS No. | 145440-80-8 |
| Molecular Formula | C3H2N2O4 |
| Molecular Weight | 130.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-Nitroisoxazol-5(2H)-one (CAS 145440-80-8) is a high-purity analytical reference standard with the molecular formula C3H2N2O4 and a molecular weight of 130.06 g/mol.
4-Nitroisoxazol-5(2H)-one (C3H2N2O4) contains an amino-acid-derived structure, an amide group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
CATO manufactures 4-Nitroisoxazol-5(2H)-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C3H2N2O4 |
| Molecular Weight | 130.06 g/mol |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1998 |
| Nitrogen Atoms | 2 |
Related Nitroisoxazol Standards
- 4-Nitroisoxazol-5-amine (CAS 861543-32-0)
- 3-Methyl-4-nitroisoxazol-5-amine (CAS 41230-51-7)
- 2-Methyl-4-nitroisoxazol-5(2H)-one (CAS 138842-45-2)
- 1-(3-Nitroisoxazol-5-yl)ethanone (CAS 54468-91-6)
- 1-(4-Nitroisoxazol-3-yl)ethanone (CAS 550301-44-5)
- 1-(4-Nitroisoxazol-5-yl)ethanone (CAS 518994-53-1)
- 1-(5-Nitroisoxazol-3-yl)ethanone (CAS 340014-77-9)
- 2-(4-Nitroisoxazol-3-yl)acetaldehyde (CAS 87149-77-7)
Recommended Standards
- 5-Oxo-2,5-dihydro-1,2,4-oxadiazole-3-carboxylic acid (CAS 1257265-24-9)
- 4-Carboxy-1,2,5-oxadiazole 2-oxide (CAS 153309-86-5)
- 2,3,3,3-Tetrafluoropropanal (CAS 24528-41-4)
- 4-Nitro-1,2,5-oxadiazol-3-amine (CAS 66328-69-6)
- 2-Bromo-6-((tert-butyldimethylsilyl)oxy)benzo[d]thiazole (CAS 945400-92-0)
- N,N-dimethyl-4-((phenylamino)methyl)aniline (CAS 3526-44-1)
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- (1R,2S)-2-ethynylcyclopropane-1-carboxylic acid (CAS 1491135-72-8)
- 2-(6-(4-Methoxyphenyl)-4-oxothieno[3,2-d]pyrimidin-3(4H)-yl)acetic acid (CAS 870692-87-8)
- 4-Fluoro-3-(methoxymethoxy)phenylboronic acid (CAS 2246556-68-1)
- 5-Chloro-2-[(4-chloro-1-naphthyl)oxy]aniline (CAS 134897-75-9)
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- 2-Methyl-4,5,6,7-tetrahydrothiazolo[4,5-c]pyridine (CAS 933722-13-5)
- Amyloid Precursor Frameshift Mutant C-Terminal Peptide trifluoroacetate salt (CAS 189125-14-2)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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