3-(3-Nitrophenyl)propiolic acid CAS 4996-15-0
| CAS No. | 4996-15-0 |
| Molecular Formula | C9H5NO4 |
| Molecular Weight | 191.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-(3-Nitrophenyl)propiolic acid (CAS 4996-15-0), molecular formula C9H5NO4 and molecular weight 191.14 g/mol, is a CATO reference standard with documented purity and traceability.
3-(3-Nitrophenyl)propiolic acid (C9H5NO4) contains an amino-acid-derived structure, an amide group, a hydroxyl 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C9H5NO4 |
| 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.) | 1958 |
| Nitrogen Atoms | 1 |
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)-1,2,4-oxadiazole (CAS 90049-83-5)
- 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)
- 3-Nitro-1,5-naphthyridin-2(1H)-one (CAS 64222-33-9)
- 2-Oxo-1,2-dihydropyrido[2,3-b]pyrazine-3-carboxylic acid (CAS 91997-11-4)
- 3-Nitro-1,8-naphthyridin-2(1h)-one (CAS 5174-89-0)
- 2-Bromo-3-formylbenzothiophene (CAS 39856-98-9)
- Ethyl 1-(4-methyl-6-(trifluoromethyl)pyrimidin-2-yl)piperidine-4-carboxylate (CAS 832740-03-1)
- N2-(3-methoxypropyl)-5-nitropyridine-2,6-diamine (CAS 1525527-26-7)
- 4-(2-(Chloromethyl)butyl)-2-methylthiazole (CAS 1495126-25-4)
- 2-(5-Methyl-2-thienyl)-2-morpholinoethylamine (CAS 1094226-79-5)
- Methyl 3-phenyl-6,7-dihydro-5H-pyrrolo[2,1-c][1,2,4]triazole-5-carboxylate (CAS 116340-27-3)
- [1,1'-Biphenyl]-2,2',4,4'-tetraamine (CAS 4371-30-6)
- 2-Chloro-N-((2-oxopyrrolidin-1-yl)methyl)ethanesulfinamide (CAS 89187-64-4)
- 3-[(5-Bromo-4-methyl-2-pyridinyl)amino]-1-propanol (CAS 1220019-47-5)
- Semaglutide Impurity 158 (x TFA Salt) (CAS CATO-C4X-2226158)
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