1-Methyl-4-nitro-1,2-dihydro-3H-indazol-3-one CAS 878156-08-2
| CAS No. | 878156-08-2 |
| Molecular Formula | C8H7N3O3 |
| Molecular Weight | 193.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO supplies 1-Methyl-4-nitro-1,2-dihydro-3H-indazol-3-one (CAS 878156-08-2), a certified reference material (molecular formula C8H7N3O3, MW 193.16 g/mol) for analytical method development and quality control.
Structurally, 1-Methyl-4-nitro-1,2-dihydro-3H-indazol-3-one (C8H7N3O3) 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 193.16 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).
As a certified reference material (CRM), 1-Methyl-4-nitro-1,2-dihydro-3H-indazol-3-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C8H7N3O3 |
| Molecular Weight | 193.16 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 |
| 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.) | 1987 |
| Nitrogen Atoms | 3 |
Related Methyl Standards
- (6-Nitro-1H-indazol-3-yl)methanol (CAS 1000341-10-5)
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- (6-Nitro-1H-benzo[d]imidazol-4-yl)methanol (CAS 1169789-14-3)
- 3'-Methyl-4-nitro-1'H-1,4'-bipyrazole (CAS 1171725-06-6)
- 2-Methyl-4-nitro-1H-benzo[d]imidazol-5-ol (CAS 127025-81-4)
- 3-Nitro-7,8-dihydro-1,6-naphthyridin-5(6H)-one (CAS 1393551-82-0)
- 4-Nitro-2-vinylbenzoic acid (CAS 1448307-89-8)
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Recommended Standards
- 1-Methyl-4-(1,2-oxazol-5-yl)-1h-pyrazole-5-carboxylic acid (CAS 925200-28-8)
- 1-Methyl-4-oxo-4,7-dihydro-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid (CAS 54738-83-9)
- 1-Methyl-4-(1,2-oxazol-5-yl)-1h-pyrazole-3-carboxylic acid (CAS 956985-41-4)
- 1-Methyl-5-oxo-4,5-dihydro-1H-pyrazolo[4,3-b]pyridine-6-carboxylic acid (CAS 2138005-55-5)
- 124338-73-4 10-(4-Ethylpiperazin-1-yl)-9-fluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid DTXSID70516744 (CAS 124338-73-4)
- S-propionylthiocholine iodide (CAS 1866-73-5)
- 5-Amino-3-chloropyrazine-2-carboxylic acid (CAS 1206249-88-8)
- 4-Nitro-N-phenethylbenzamide (CAS 62497-65-8)
- methyl 5-chloroimidazo[1,2-a]pyridine-8-carboxylate (CAS 1402911-36-7)
- 2,2,4-trimethyl-1,2-dihydroquinoline hydrochloride (CAS 34333-31-8)
- 1-(Quinolin-2-ylmethyl)cyclohexanol (CAS 132148-33-5)
- 2-Bromo-5,6-dihydrobenzo[b]thiophen-7(4H)-one (CAS 1369138-74-8)
- Cyclopropyl(3-(1,1,2,2-tetrafluoroethoxy)phenyl)methanone (CAS 1443347-60-1)
- Semaglutide impurity 30 (CAS CATO-C4X-222630)
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