Ethyl pyrazolo[1,5-b]pyridazine-3-carboxylate CAS 55259-43-3
| CAS No. | 55259-43-3 |
| Molecular Formula | C9H9N3O2 |
| Molecular Weight | 191.19 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 Ethyl pyrazolo[1,5-b]pyridazine-3-carboxylate (CAS 55259-43-3), a certified reference material (molecular formula C9H9N3O2, MW 191.19 g/mol) for analytical method development and quality control.
The molecular framework of Ethyl pyrazolo[1,5-b]pyridazine-3-carboxylate (C9H9N3O2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), Ethyl pyrazolo[1,5-b]pyridazine-3-carboxylate 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 | C9H9N3O2 |
| Molecular Weight | 191.19 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 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Nitrogen Atoms | 3 |
Related Ethyl Standards
- Ethyl pyrazolo[1,5-a]pyrimidine-6-carboxylate (CAS 1022920-59-7)
- Ethyl Pyrazolo[1,5-a] Pyrazine-3-Carboxylate (CAS 1219694-61-7)
- 3-(1H-Pyrazolo[3,4-b]pyridin-3-yl)propanoic acid (CAS 1246520-77-3)
- Ethyl pyrazolo[1,5-a]pyrimidine-2-carboxylate (CAS 1353498-59-5)
- Ethyl pyrazolo[1,5-b]pyridazine-2-carboxylate (CAS 1408076-32-3)
- 1H-pyrazolo[3,4-c]pyridine-7-carboxylic acid, ethyl ester (CAS 945840-81-3)
- ethyl pyrazolo[1,5-a]pyrimidine-5-carboxylate (CAS 619306-82-0)
- Ethyl pyrazolo[1,5-c]pyrimidine-5-carboxylate (CAS 2767264-82-2)
Recommended Standards
- ethyl imidazo[1,5-a]pyrimidine-8-carboxylate (CAS 32704-60-2)
- Imidocarb Impurity 2 (CAS 31659-42-4)
- Ethyl imidazo[1,5-a]pyrazine-3-carboxylate (CAS 55316-47-7)
- Methyl 1-amino-1H-benzo[d]imidazole-2-carboxylate (CAS 49628-57-1)
- (R)-2-(2,3-Difluorobenzyl)piperazine (CAS 1240584-07-9)
- 1-(2,3-Dihydro-4H-benzo[b][1,4]oxazin-4-yl)-2-(piperazin-1-yl)ethan-1-one (CAS 1308565-07-2)
- (2R,4r,5S)-5-aminospiro[3.3]Heptane-2-carboxylic acid (CAS 1682749-10-5)
- 6-Amino-5-bromopyridine-3-sulfonamide (CAS 1023816-98-9)
- Mirabegron Impurity 144 (CAS CATO-C4X-1032144)
- (R)-2-(3-(Hydroxymethyl)phenoxy)butanoic acid (CAS 1139688-76-8)
- 4-Cyanothiophene-3-carboxylic acid (CAS 78071-34-8)
- (4Z,7Z,10Z,12E,16Z,19Z)-14-Hydroxydocosa-4,7,10,12,16,19-hexaenoic acid (CAS 87042-40-8)
- Bifenox (Free Acid) (CAS 53774-07-5)
- Retatrutide (CAS 2381089-83-2)
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