3-Chloropyridazine CAS 1120-95-2
| CAS No. | 1120-95-2 |
| Molecular Formula | C4H3ClN2 |
| Molecular Weight | 114.53 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3-Chloropyridazine is closely related to a nitrile group, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
3-Chloropyridazine (CAS 1120-95-2), molecular formula C4H3ClN2 and molecular weight 114.53 g/mol, is a CATO reference standard with documented purity and traceability.
3-Chloropyridazine (C4H3ClN2) contains a nitrile group, 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C4H3ClN2 |
| Molecular Weight | 114.53 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 Chloropyridazine Standards
- 4-Chloropyridazine (CAS 17180-92-6)
- 3-Chloropyridazine-4-carbonitrile (CAS 1445-56-3)
- 6-Chloropyridazine-4-carbonitrile (CAS 1780924-86-8)
- 6-Chloropyridazine-3-carbonitrile (CAS 35857-89-7)
- 3-Chloropyridazine-4-carbaldehyde (CAS 1797131-37-3)
- 4-Chloropyridazine-3,5-diamine (CAS 1500-83-0)
- 3-Chloropyridazine-4,5-diamine (CAS 78460-97-6)
- 5-Chloropyridazine-3,4-diamine (CAS 89123-72-8)
Recommended Standards
- 2,2-Difluoropropyl Chloride (CAS 420-99-5)
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- rel-Ethyl (1R,5R,6R)-3-(((trifluoromethyl)sulfonyl)oxy)bicyclo[3.1.0]hex-2-ene-6-carboxylate (CAS 1449662-65-0)
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- N-((1-Propyl-1H-pyrazol-3-yl)methyl)pentan-1-amine hydrochloride (CAS 1856036-53-7)
- Methyl 2-(methylthio)pyrimidine-4-carboxylate (CAS 64224-67-5)
- 4-Amino-5-methylpyridine-2-methanol (CAS 1805513-80-7)
- Heptapeptide-6 (CAS CATO-CPTD788823)
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