Pyrimidone

{{chembox

| Watchedfields = changed

| verifiedrevid = 418471733

| Name = 4-Pyrimidone

| ImageFile = 4-Pyrimidone.png

| ImageSize = 120px

| PIN = 1H-Pyrimidin-6-one

| OtherNames = Hydroxypyrimidine; Pyrimidinone

|Section1={{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|CAS}}

| CASNo = 557-01-7

| CASNo_Comment = 2-Pyrimidone

| CASNo1_Ref = {{fdacite|correct|CAS}}

| CASNo1 = 4562-27-0

| CASNo1_Comment = 4-Pyrimidone

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

| UNII = 13K708ILY4

| UNII_Comment = 2-Pyrimidone

| UNII1_Ref = {{fdacite|correct|FDA}}

| UNII1 = K43V90OY4L

| UNII1_Comment = 4-Pyrimidone

| PubChem = 20695

| SMILES = O=C1NC=NC=C1

| ChemSpiderID = 61686

| ChemSpiderID_Comment = 2-Pyrimidone

| ChemSpiderID1 = 19489

| ChemSpiderID1_Comment = 4-Pyrimidone

}}

|Section2={{Chembox Properties

| C=4 | H=4 | N=2 | O=1

| Appearance = White to light yellow powder

| Density =

| MeltingPtC = 163 to 168

| MeltingPt_notes =

| BoilingPt =

| Solubility = }}

|Section3={{Chembox Hazards

| MainHazards = Respiratory system, eye, skin irritation

| FlashPt =

| AutoignitionPt =

}}

}}

Pyrimidone is the name given to either of two heterocyclic compounds with the formula C₄H₄N₂O: 2-pyrimidone and 4-pyrimidone. The compounds can also be called 2-hydroxypyrimidine or 4-hydroxypyrimidine respectively, based on a substituted pyrimidine, or 1,3-diazine, ring.