pyrazolidine

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 425120995

| ImageFileL1 = pyrazolidine numbering.png

| ImageClassL1 = skin-invert-image

| ImageSizeL1 = 120px

| ImageAltL1 = Structural formula of pyrazolidine

| ImageFileR1 = Pyrazolidine 3D ball.png

| ImageSizeR1 = 120

| ImageAltR1 = Ball-and-stick model of the pyrazolidine molecule

| PIN = Pyrazolidine{{cite book |author=International Union of Pure and Applied Chemistry |date=2014 |title=Nomenclature of Organic Chemistry: IUPAC Recommendations and Preferred Names 2013 |publisher=The Royal Society of Chemistry |pages=142 |doi=10.1039/9781849733069 |isbn=978-0-85404-182-4}}

| OtherNames = 1,2-Diazolidine

|Section1={{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|??}}

| CASNo =504-70-1

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = Y0MA3161MR

| PubChem =79033

| SMILES =C1CNNC1

| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}

| ChemSpiderID = 71365

| InChI = 1/C3H8N2/c1-2-4-5-3-1/h4-5H,1-3H2

| InChIKey = USPWKWBDZOARPV-UHFFFAOYAM

| StdInChI_Ref = {{stdinchicite|changed|chemspider}}

| StdInChI = 1S/C3H8N2/c1-2-4-5-3-1/h4-5H,1-3H2

| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}

| StdInChIKey = USPWKWBDZOARPV-UHFFFAOYSA-N

| RTECS =

| MeSHName =

| ChEBI_Ref = {{ebicite|changed|EBI}}

| ChEBI = 33138

}}

|Section2={{Chembox Properties

| Formula =C₃H₈N₂

| MolarMass =72.10902

| Appearance =

| Density =1.00 g/cm³ (20 °C){{cite journal | last=Buhle | first=Emmett L. | last2=Moore | first2=Alexander M. | last3=Wiselogle | first3=F. Y. | title=The Configuration of Tervalent Nitrogen. A Bicyclic Hydrazine Derivative1 | journal=Journal of the American Chemical Society | publisher=American Chemical Society (ACS) | volume=65 | issue=1 | year=1943 | issn=0002-7863 | doi=10.1021/ja01241a009 | pages=29–32}}

| MeltingPtC = 10 to 12

| MeltingPt_notes =

| BoilingPtC =138

| Solubility =

| RefractIndex= 1.477

}}

|Section3={{Chembox Hazards

| MainHazards =

| FlashPt =

| AutoignitionPt =

}}

}}

Pyrazolidine is a heterocyclic compound. It is a liquid that is stable in air, but it is hygroscopic.