3-(4-Methoxyphenyl)-4-oxo-3,4-dihydrophthalazine-1-carboxylic acid CAS 36710-94-8
| CAS No. | 36710-94-8 |
| Molecular Formula | C16H12N2O4 |
| Molecular Weight | 296.28 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
3-(4-Methoxyphenyl)-4-oxo-3,4-dihydrophthalazine-1-carboxylic acid (CAS 36710-94-8), molecular formula C16H12N2O4 and molecular weight 296.28 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, 3-(4-Methoxyphenyl)-4-oxo-3,4-dihydrophthalazine-1-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 296.28 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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), 3-(4-Methoxyphenyl)-4-oxo-3,4-dihydrophthalazine-1-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.
Physical & Chemical Properties
| Molecular Formula | C16H12N2O4 |
| Molecular Weight | 296.28 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
| Nitrogen Atoms | 2 |
Related Methoxyphenyl Standards
- 1-(4-Methoxyphenyl)-5-(pyridin-4-yl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 1017416-33-9)
- 1-(4-Methoxyphenyl)-5-(pyridin-3-yl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 1031977-09-9)
- 1-(2-Methoxyphenyl)-5-pyridin-4-yl-1H-1,2,3-triazole-4-carboxylic acid (CAS 1223881-43-3)
- 1-(2-Methoxyphenyl)-5-(pyridin-2-yl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 1326927-55-2)
- 2-(4-Methoxyphenyl)-N-(pyridin-2-yl)-2H-tetrazole-5-carboxamide (CAS 1396791-58-4)
- (2-Methoxyphenyl)(5-nitro-1H-indol-1-yl)methanone (CAS 820234-20-6)
- (4-Methoxyphenyl)(5-nitro-1H-indol-1-yl)methanone (CAS 820234-19-3)
- 2-(5-(2-Methoxyphenyl)-1,3,4-oxadiazol-2-yl)benzoic acid (CAS 56894-55-4)
Recommended Standards
- 3-(3-methylphenyl)-2,4-dioxo-1,2,3,4-tetrahydroquinazoline-7-carboxylic acid (CAS 926234-11-9)
- 3,3'-([2,2'-Bipyridine]-4,4'-diyl)diacrylic acid (CAS 845307-48-4)
- 2-Hydroxy-N-{[3-oxo-2-benzofuran-1(3H)-yliden]methyl}benzenecarbohydrazide (CAS 320424-95-1)
- 3-[(E)-1-Nitro-2-(phenylamino)ethenyl]-1,3-dihydro-2-benzofuran-1-one (CAS 338753-92-7)
- 4-(5-Bromothiophen-2-yl)butan-1-amine (CAS 1216048-34-8)
- Ethyl 4-amino-3-(2,5-difluorophenyl)-2-thioxo-2,3-dihydrothiazole-5-carboxylate (CAS 689772-21-2)
- 6-(3-Chloropropoxy)-2-(4-(3-chloropropoxy)phenyl)benzo[d]oxazole (CAS 1219925-75-3)
- (6-Fluoro-2-(trifluoromethyl)pyridin-3-yl)boronic acid (CAS 2096339-79-4)
- 3-Phenyl-1H-indazole (CAS 13097-01-3)
- n-(4,5-Dihydro-1,3-thiazol-2-yl)acetamide (CAS 6558-31-2)
- 2-(6-Ethyl-5-methyl-2,3-dihydro-1H-inden-1-yl)-4,5-dihydro-1H-imidazole (CAS 623573-17-1)
- Linezolid Impurity 113 (CAS CATO-C4X-1073113)
- Procaterol Impurity 40 (CAS 63483-95-4)
- Semaglutide impurity 68 (CAS CATO-C4X-222668)
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