3-chloro-4-methoxy-pyridazine CAS 1677-81-2
| CAS No. | 1677-81-2 |
| Molecular Formula | C5H5ClN2O |
| Molecular Weight | 144.56 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3-chloro-4-methoxy-pyridazine is closely related to an amide group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 3-chloro-4-methoxy-pyridazine (CAS 1677-81-2), a certified reference material (molecular formula C5H5ClN2O, MW 144.56 g/mol) for analytical method development and quality control.
Owing to an amide group, a hydroxyl group, an ether linkage, chlorine substitution, 3-chloro-4-methoxy-pyridazine is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 144.56 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 manufactures 3-chloro-4-methoxy-pyridazine under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C5H5ClN2O |
| Molecular Weight | 144.56 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related chloro Standards
- 6-Chloro-5-methylpyrimidin-2(1H)-one (CAS 101080-24-4)
- 4-Chloro-2-methylpyrimidin-5-ol (CAS 103660-23-7)
- 5-Chloro-4-methyl-2,3-dihydropyridazin-3-one (CAS 104566-45-2)
- 2-Chloro-5-(hydroxymethyl)pyrimidine (CAS 1046816-75-4)
- 4-Chloro-5-methyl-1H-pyrazole-3-carbaldehyde (CAS 1050642-24-4)
- 5-Chloro-3-methylpyrazin-2(1H)-one (CAS 105985-18-0)
- 5-Chloro-4-methylpyrimidine 1-oxide (CAS 114969-55-0)
- 5-Chloro-4-methoxypyrimidine (CAS 114969-94-7)
Recommended Standards
- 5-(Chloromethyl)furan-2-carbaldehyde (CAS 1623-88-7)
- 6-Chloro-5-methylpyridazin-3(2H)-one (CAS 1703-07-7)
- 2-(1H-Imidazol-1-yl)acetyl chloride (CAS 160975-66-6)
- 4-Chloro-6-methyl-2H-pyran-2-one (CAS 17422-72-9)
- Methyl 2-(4-chloro-3-methylphenyl)-2-oxoacetate (CAS 1379348-33-0)
- Ethyl 4-(dimethylamino)-3-{[(dimethylamino)methylene]amino}thieno[2,3-b]pyridine-2-carboxylate (CAS 1164506-81-3)
- 3-(3-fluorophenyl)-1H-pyrazole hydrochloride (CAS 2060063-22-9)
- 4-(Difluoromethyl)-5-nitro-6-(trifluoromethoxy)pyridine-2-sulfonamide (CAS 1806162-24-2)
- Ethyl 2-(3-methoxy-4-nitrophenyl)acetate (CAS 1258845-94-1)
- Piperacillin EP Impurity F (CAS 3112735-85-7)
- 1-Nitropyrene-d9 (CAS 93487-20-8)
- 1-Bromo-2,3-dimethyl-4-(phenylmethoxy)benzene (CAS 148581-23-1)
- 1-(2,2-Diethoxyethyl)-1H-pyrrole-2-carboxamide (CAS 136927-44-1)
- Semaglutide Impurity 139 (CAS CATO-C4X-2226139)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com