5-Methyl-4-[(3-nitro-1h-pyrazol-1-yl)methyl]-1,2-oxazole-3-carboxylic acid CAS 1006951-15-0
| CAS No. | 1006951-15-0 |
| Molecular Formula | C9H8N4O5 |
| Molecular Weight | 252.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-Methyl-4-[(3-nitro-1h-pyrazol-1-yl)methyl]-1,2-oxazole-3-carboxylic acid 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.
5-Methyl-4-[(3-nitro-1h-pyrazol-1-yl)methyl]-1,2-oxazole-3-carboxylic acid (CAS 1006951-15-0), molecular formula C9H8N4O5 and molecular weight 252.18 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 5-Methyl-4-[(3-nitro-1h-pyrazol-1-yl)methyl]-1,2-oxazole-3-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 252.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C9H8N4O5 |
| Molecular Weight | 252.18 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.) | 1988 |
| Nitrogen Atoms | 4 |
Related Methyl Standards
- 2-Methyl-7-nitro-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-2-carboxylic acid (CAS 154365-43-2)
- 2-Methyl-6-nitro-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-2-carboxylic acid (CAS 154365-44-3)
- 3-(6-Nitro-2-oxo-2,3-dihydro-1,3-benzoxazol-3-yl)propanoic acid (CAS 17124-57-1)
- 2-(6-Nitro-3-oxo-3,4-dihydro-2h-1,4-benzoxazin-4-yl)acetic acid (CAS 869464-86-8)
- 5-methyl-4-[(4-nitro-1H-pyrazol-1-yl)methyl]-1,2-oxazole-3-carboxylic acid (CAS 956758-72-8)
- Methyl 1-((3-nitro-1h-1,2,4-triazol-1-yl)methyl)-1h-pyrazole-3-carboxylate (CAS 1001499-88-2)
- 1-((3-Nitro-1h-1,2,4-triazol-1-yl)methyl)-1h-pyrazole-3-carbohydrazide (CAS 1001500-00-0)
- 3-Methyl-4-nitro-1-(2,2,2-trifluoroethyl)-1H-pyrazole-5-carboxamide (CAS 89239-86-1)
Recommended Standards
- 7-bromo-3-methylthieno[3,2-c]pyridin-4-ol (CAS 2306268-62-0)
- 4-[Bis-(2-chloroethyl)amino]benzaldehyde (CAS 1208-03-3)
- 4-bromo-3-methyl-thieno[2,3-c]pyridin-7-ol (CAS 2306271-99-6)
- N-((3-Methyl-1,2,4-oxadiazol-5-yl)methyl)-5-nitrofuran-2-carboxamide (CAS 1209130-02-8)
- 5-Amino-1,3,4-oxadiazole-2-carboximidamide (CAS 1255147-19-3)
- (Lys(Me)??)-Histone H3 (1-21)-Gly-Gly-Lys(biotinyl) trifluoroacetate salt (CAS 2022956-70-1)
- Methyl 2-(3-isopropylphenyl)-2-oxoacetate (CAS 1443342-70-8)
- 7-Ethylisoxazolo[3,4-d]pyrimidine-4,6(5H,7H)-dione (CAS 65183-61-1)
- 1-[2,4-bis(propan-2-yl)phenyl]-2-chloroethan-1-one (CAS 164165-76-8)
- N-isobutyl-3-(piperazin-1-yl)propanamide (CAS 89009-63-2)
- 2-(4-(Tosyloxy)piperidin-1-yl)acetic acid (CAS 1353959-54-2)
- 2-((4-Methoxy-N-phenylphenyl)sulfonamido)-N-(2-methylbut-3-yn-2-yl)acetamide (CAS 339013-35-3)
- 2-Mercapto-5,6,7,8-tetrahydroquinazoline-6-carboxylic acid (CAS 1556457-03-4)
- Semaglutide Impurity 147 (CAS CATO-C4X-2226147)
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