6-Methyl-4-oxo-9-(2-phenylhydrazono)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid CAS 70999-42-7
| CAS No. | 70999-42-7 |
| Molecular Formula | C16H16N4O3 |
| Molecular Weight | 312.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 6-Methyl-4-oxo-9-(2-phenylhydrazono)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (C16H16N4O3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 312.32 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies 6-Methyl-4-oxo-9-(2-phenylhydrazono)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (CAS 70999-42-7), a certified reference material (molecular formula C16H16N4O3, MW 312.32 g/mol) for analytical method development and quality control.
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 | C16H16N4O3 |
| Molecular Weight | 312.32 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Nitrogen Atoms | 4 |
Recommended Standards
- 6-Amino-4-(2,4-dimethoxyphenyl)-3-methyl-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile (CAS 89607-46-5)
- 7-(4-Phenoxyphenyl)pyrazolo[1,5-a]pyrimidine-3-carbonitrile (CAS 320417-19-4)
- 6-Amino-3-ethyl-1,2,3,4-tetrahydro-β,2,4-trioxo-1-(phenylmethyl)-5-pyrimidinepropanenitrile (CAS 571149-75-2)
- 7,8,4'-Trimethoxyisoflavone (CAS 37816-21-0)
- 2,4-Dichloro-6-fluoropyridine (CAS 51991-31-2)
- L-Glutamic Acid (CAS 56-86-0)
- 4-(Bromomethyl)-5-methyl-2-phenyl-2H-1,2,3-triazole (CAS 13322-02-6)
- 4-(4-(4-Bromophenyl)-5-((2-chloro-6-fluorobenzyl)thio)-4H-1,2,4-triazol-3-yl)pyridine (CAS 477330-23-7)
- Ethyl 6-(cyano(phenyl)methyl)picolinate (CAS 1379526-97-2)
- (5-Carbamoylpyridin-3-yl)boronic acid (CAS 1321900-96-2)
- Ethyl 5-Bromoimidazole-2-carboxylate (CAS 944900-49-6)
- 3-Iodo-1-(propan-2-yl)-1H-pyrazole-4-carbaldehyde (CAS 1946813-73-5)
- 3-[(2-oxo-4,10-Dihydro-3H-pyrimido[1,2-a]benzimidazole-4-carbonyl)amino]benzoic acid (CAS 1246041-01-9)
- Semaglutide impurity 39 (CAS CATO-C4X-222639)
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