:Chromone

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 399524554

| ImageFile= chromone.svg

| ImageSize= 150px

| IUPACName= Chromen-4-one

| PIN = 4H-1-Benzopyran-4-one

| OtherNames=4-Chromone; 1,4-Benzopyrone; 4H-Chromen-4-one; Benzo-gamma-pyrone; 1-Benzopyran-4-one; 4H-Benzo(b)pyran-4-one

|Section1={{Chembox Identifiers

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

| CASNo=491-38-3

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

| UNII = 20C556MJ76

| PubChem=10286

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

| ChEBI = 72013

| ChEMBL_Ref = {{ebicite|changed|EBI}}

| ChEMBL = 13311

| SMILES = O=C1C=COc2ccccc12

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

| ChemSpiderID = 9866

| InChI = 1/C9H6O2/c10-8-5-6-11-9-4-2-1-3-7(8)9/h1-6H

| InChIKey = OTAFHZMPRISVEM-UHFFFAOYAY

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

| StdInChI = 1S/C9H6O2/c10-8-5-6-11-9-4-2-1-3-7(8)9/h1-6H

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

| StdInChIKey = OTAFHZMPRISVEM-UHFFFAOYSA-N

}}

|Section2={{Chembox Properties

| C=9 | H=6 | O=2

| Appearance=

| Density=

| MeltingPt=

| BoilingPt=

| Solubility=

| pKa=−2.0 (of conjugate acid)

}}

|Section3={{Chembox Hazards

| MainHazards=

| FlashPt=

| AutoignitionPt =

}}

}}

Chromone (or 1,4-benzopyrone) is a derivative of benzopyran with a substituted keto group on the pyran ring. It is an isomer of coumarin.

Derivatives of chromone are collectively known as chromones. Most, though not all, chromones are also phenylpropanoids.