Pyrazoline
{{Chembox
| Name = Pyrazolines
| ImageFileL1 =1-Pyrazoline.svg
| ImageClassL1 = skin-invert-image
| ImageCaptionL1 = 1-Pyrazoline
| ImageFileR1 = Pyrazoline.svg
| ImageClassR1 = skin-invert-image
| ImageCaptionR1 = 2-Pyrazoline
| ImageFileL2 = 3-Pyrazoline.svg
| ImageClassL2 = skin-invert-image
| ImageCaptionL2 = 3-Pyrazoline
| IUPACName =
| OtherNames =
|Section1={{Chembox Identifiers
| index1_label = (1-pyrazoline)
| index2_label = (2-pyrazoline)
| index3_label = (3-pyrazoline)
| CASNo = 36118-45-3
| CASNo_Comment = (unspecified isomer)
| CASNo_Ref = {{cascite|correct|}}
| CASNo1 = 2721-43-9
| CASNo1_Comment =
| CASNo1_Ref = {{cascite|correct|}}
| CASNo2 = 109-98-8
| CASNo2_Ref = {{cascite|correct|}}
| CASNo3 = 6569-23-9
| CASNo3_Ref = {{cascite|correct|}}
| ChemSpiderID1 = 457111
| ChemSpiderID2 = 60321
| ChemSpiderID3 = 3368027
| PubChem1 = 524190
| PubChem2 = 66962
| PubChem3 = 4156003
| SMILES1 = C1CCN=N1
| SMILES2 = C1=NNCC1
| SMILES3 = C1=CCNN1
| InChI1=1S/C3H6N2/c1-2-4-5-3-1/h1-3H2
| InChIKey1 = DNXIASIHZYFFRO-UHFFFAOYSA-N
| InChI2=1S/C3H6N2/c1-2-4-5-3-1/h2,5H,1,3H2
| InChIKey2 = MCGBIXXDQFWVDW-UHFFFAOYSA-N
| InChI3=1S/C3H6N2/c1-2-4-5-3-1/h1-2,4-5H,3H2
| InChIKey3 = KEQTWHPMSVAFDA-UHFFFAOYSA-N
}}
|Section2={{Chembox Properties
| C=3 | H=6 | N=2
| Appearance =
| Density =
| MeltingPt =
| BoilingPt =
| Solubility = }}
|Section3={{Chembox Hazards
| MainHazards =
| FlashPt =
| AutoignitionPt = }}
}}
Pyrazoline is a heterocyclic chemical compound with the molecular formula C3H6N2. Pyrazoline and its derivatives are intermediates in the synthesis of more complex chemical compounds.{{cite journal | doi = 10.1039/C7RA08939B | title = Unveiling a versatile heterocycle: Pyrazoline – a review | date = 2017 | last1 = Varghese | first1 = Beena | last2 = Al-Busafi | first2 = Saleh N. | last3 = Suliman | first3 = Fakhreldin O. | last4 = Al-Kindy | first4 = Salma M. Z. | journal = RSC Adv | volume = 7 | issue = 74 | pages = 46999–47016 | bibcode = 2017RSCAd...746999V | doi-access = free }}