5-chloropyridazin-3-ol CAS 660425-07-0
| CAS No. | 660425-07-0 |
| Molecular Formula | C4H7ClN2O |
| Molecular Weight | 134.56 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-chloropyridazin-3-ol (CAS 660425-07-0), molecular formula C4H7ClN2O and molecular weight 134.56 g/mol, is a CATO reference standard with documented purity and traceability.
5-chloropyridazin-3-ol (C4H7ClN2O) contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
As a certified reference material (CRM), 5-chloropyridazin-3-ol 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 | C4H7ClN2O |
| Molecular Weight | 134.56 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 | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related chloropyridazin Standards
- 4-chloropyridazin-3-amine (CAS 1353101-17-3)
- 5-chloropyridazin-4-amine (CAS 53180-92-0)
- 5-chloropyridazin-4-ol (CAS 1245643-70-2)
- 6-chloropyridazin-4-ol (CAS 1415928-75-4)
- 3-Chloropyridazin-4-ol (CAS 1379240-74-0)
- 4-Chloropyridazin-3(2H)-one (CAS 1677-79-8)
- 5-Chloropyridazin-3-amine (CAS 1314978-36-3)
- (6-chloropyridazin-3-yl)methanamine (CAS 871826-15-2)
Recommended Standards
- 5-chloro-3,4-dihydropyrimidin-4-one (CAS 4349-08-0)
- Allyl 2-chloroacetate (CAS 2916-14-5)
- 5-chloro-1H-imidazole-4-carbaldehyde (CAS 61994-11-4)
- Cyclobutyl Carbonochloridate (Technical Grade) (CAS 81228-87-7)
- 6-Methyl-6H-indolo[2,3-b]quinoxaline (CAS 65880-39-9)
- Cyclopentyl(imino)(methyl)-l6-sulfanone (CAS 1967807-31-3)
- tert-Butyl 3-benzylimidazolidine-1-carboxylate (CAS 623943-75-9)
- Ethyl 3,5-diethoxybenzoate (CAS 351002-95-4)
- dimethyl (1-(tert-butyldimethylsilyl)-1H-pyrrolo[2,3-b]pyridin-5-yl)boronate (CAS 754214-61-4)
- 5-Ethynyl-2-methylbenzonitrile (CAS 1849380-64-8)
- 3-Hexyl-4-(2-hydroxytridecyl)-2-oxetanone 2-Tetrahydropyranyl Ether (CAS 104802-31-5)
- N-(2-aminoethyl)-1-methyl-1H-pyrrole-2-carboxamide (CAS 1000931-92-9)
- N-(4-Amino-2-methylphenyl)-2-(4-chlorophenyl)-acetamide (CAS 1016834-84-6)
- Endo-Ala35-Tirzepatide (CAS CATO-CPTD788687)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com