| | Identification | Back Directory |  | [Name] 
 3,5-Dichloropyridazine
 |  | [CAS] 
 1837-55-4
 |  | [Synonyms] 
 SA029519
 5-Dichloropyridazine
 3,5-Dichloropyridazine
 Pyridazine,3,5-dichloro-
 3,5-Dichloropyridazine>
 3,5-Dichloropyridazine ISO 9001:2015 REACH
 |  | [Molecular Formula] 
 C4H2Cl2N2
 |  | [MDL Number] 
 MFCD10698048
 |  | [MOL File] 
 1837-55-4.mol
 |  | [Molecular Weight] 
 148.98
 | 
 | Chemical Properties | Back Directory |  | [Melting point ] 
 60.0 to 64.0 °C
 |  | [Boiling point ] 
 280.8±20.0 °C(Predicted)
 |  | [density ] 
 1.493±0.06 g/cm3(Predicted)
 |  | [storage temp. ] 
 Keep in dark place,Sealed in dry,Room Temperature
 |  | [solubility ] 
 DMSO (Sparingly), Methanol (Slightly)
 |  | [form ] 
 Solid
 |  | [pka] 
 -0.25±0.10(Predicted)
 |  | [color ] 
 Yellow to Dark Orange
 |  | [InChI] 
 InChI=1S/C4H2Cl2N2/c5-3-1-4(6)8-7-2-3/h1-2H
 |  | [InChIKey] 
 JZSAUQMXKHBZEO-UHFFFAOYSA-N
 |  | [SMILES] 
 C1(Cl)=NN=CC(Cl)=C1
 | 
 | Hazard Information | Back Directory |  | [Chemical Properties] 
 Yellow solid powder.
 |  | [Uses] 
 3,5-Dichloropyridazine used in the treatment of asthma and allergy. Potential for antinociceptive and antiinflammatory effects
 |  | [Definition] 
 ChEBI: 3,5-Dichloropyridazine is a member of pyridazines.
 |  | [Preparation] 
 Preparation of 3,5-Dichloropyridazine:
 2,4,4,4-Tetrachlorocrotonaldehyde is dissolved in a solvent, and a mixture of semicarbazide hydrochloride, water, and solvent is added dropwise under controlled temperature conditions. The reaction is stirred for 5 hours. Afterward, the reaction mixture is concentrated under reduced pressure to remove the solvent. Water is added, and the temperature is lowered to 5°C, allowing a solid to precipitate. The solid is filtered and recrystallized using a dichloromethane/petroleum ether mixture, yielding 3,5-dichloropyridazine as a white crystalline solid.
 | 
 |  |