4-Nitro-1H-pyrrolo[2,3-b]pyridin-5-ol CAS 1190318-01-4
| CAS No. | 1190318-01-4 |
| Molecular Formula | C7H5N3O3 |
| Molecular Weight | 179.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 4-Nitro-1H-pyrrolo[2,3-b]pyridin-5-ol (C7H5N3O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 179.13 g/mol, it falls into the medium-molecular-weight range. 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).
4-Nitro-1H-pyrrolo[2,3-b]pyridin-5-ol (CAS 1190318-01-4) is a high-purity analytical reference standard with the molecular formula C7H5N3O3 and a molecular weight of 179.13 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 | C7H5N3O3 |
| Molecular Weight | 179.13 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 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.) | 1989 |
| Nitrogen Atoms | 3 |
Related Nitro Standards
- 7-nitro-1H-indazol-6-ol (CAS 1019332-61-6)
- 5-Nitro-1H-indazol-6-ol (CAS 1082041-56-2)
- 3-Nitro-1H-pyrrolo[3,2-b]pyridin-5-ol (CAS 1190311-92-2)
- 3-Nitro-1H-pyrrolo[3,2-c]pyridin-4-ol (CAS 1190314-28-3)
- 3-Nitro-1H-pyrrolo[3,2-b]pyridin-6-ol (CAS 1190318-36-5)
- 3-Nitro-1H-pyrrolo[3,2-b]pyridin-7-ol (CAS 1190318-84-3)
- 3-Nitro-1H-pyrrolo[3,2-c]pyridin-6-ol (CAS 1190320-27-4)
- 3-Nitro-1H-pyrrolo[2,3-c]pyridin-7-ol (CAS 1190322-25-8)
Recommended Standards
- 2-Amino-4-nitrobenzoxazole (CAS 1126637-53-3)
- 6-Oxo-6,7-dihydro-5H-pyrrolo[2,3-d]pyrimidine-4-carboxylic acid (CAS 1095824-74-0)
- 7-Nitroimidazo[1,2-a]pyridin-8-ol (CAS 109388-66-1)
- 3-Nitro-1H-pyrrolo[2,3-b]pyridin-4-ol (CAS 1190322-42-9)
- 1-(3-Nitrophenyl)-5-phenyl-1H-pyrazole-3-carboxylic acid (CAS 62160-88-7)
- 4-({[1-(ethanesulfonyl)piperidin-4-yl]carbamoyl}amino)benzoic acid (CAS 1240529-19-4)
- 6-Nitro-benzo[b]thiophene (CAS 17402-90-3)
- 5-(4-Fluorophenyl)-2,6-dimethylthieno[2,3-d]pyrimidin-4(3H)-one (CAS 1082134-03-9)
- 5-(5-Bromo-2-furyl)-3-methyl-1,2,4-oxadiazole (CAS 1283108-32-6)
- Methyl (2Z)-2-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-3-[(2,5-difluorophenyl)amino]prop-2-enoate (CAS 477888-08-7)
- 5-(Piperidin-1-yl)thiophene-2-carbaldehyde (CAS 24372-48-3)
- 1-Bromo-3-(trifluoromethoxy)-5-(trifluoromethyl)benzene 1417567-94-2 (CAS 1417567-94-2)
- Isoprenaline impurity 39 (CAS CATO-C4X-277539)
- Des-Pro31-Tirzepatide (CAS CATO-CPTD788943)
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