1,4-Dioxo-1,2,3,4-tetrahydrophthalazine-5-carboxylic acid CAS 67402-77-1
| CAS No. | 67402-77-1 |
| Molecular Formula | C9H6N2O4 |
| Molecular Weight | 206.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1,4-Dioxo-1,2,3,4-tetrahydrophthalazine-5-carboxylic acid (C9H6N2O4) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies 1,4-Dioxo-1,2,3,4-tetrahydrophthalazine-5-carboxylic acid (CAS 67402-77-1), a certified reference material (molecular formula C9H6N2O4, MW 206.15 g/mol) for analytical method development and quality control.
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.
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 | C9H6N2O4 |
| Molecular Weight | 206.15 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.) | 1976 |
| Nitrogen Atoms | 2 |
Related Dioxo Standards
- 2,4-Dioxo-1,2,3,4-tetrahydroquinazoline-6-carboxylic acid (CAS 1821028-80-1)
- 1,4-Dioxo-2,3-dihydrophthalazine-6-carboxylic acid (CAS 42972-13-4)
- 2,3-Dioxo-1,2,3,4-tetrahydroquinoxaline-5-carboxylic acid (CAS 876715-75-2)
- 2,4-dioxo-1,2,3,4-tetrahydroquinazoline-5-carboxylic acid (CAS 5715-10-6)
- 2-{1,3-dioxo-1h,2h,3h-pyrrolo[3,4-c]pyridin-2-yl}acetic acid (CAS 36239-69-7)
- Methyl 1,3-dioxo-1,3-dihydroisobenzofuran-5-carboxylate (CAS 2902-64-9)
- (5,7-Dioxo-5,7-dihydro-6H-pyrrolo[3,4-b]pyridin-6-yl)acetic acid 1644AE 36239-67-5 C9H6N2O4 (CAS 36239-67-5)
- methyl 2,4-dioxo-4-phenylbutanoate (CAS 20577-73-5)
Recommended Standards
- 1-(2-Fluorophenyl)-4-((5-nitrofuran-2-yl)methyl)piperazine (CAS 528-88-1)
- 3-nitropyridine-2-sulfonyl fluoride (CAS 1955493-45-4)
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- 5-nitropyridine-2-sulfonyl fluoride (CAS 1935641-61-4)
- Methyl 1-(2-(cyclopentylamino)-2-oxoethyl)-3-cyclopropyl-6-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylate (CAS 1018052-47-5)
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- 1-((5-Chloro-1-methyl-1h-imidazol-2-yl)methyl)-1h-1,2,3-triazol-4-amine (CAS 1517411-30-1)
- Bis(5-phenylfuran-2-yl)methane (CAS 102732-77-4)
- D-Ala28-Tirzepatide (CAS CATO-CPTD788906)
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