Butyric anhydride

{{chembox

| verifiedrevid = 401787525

| Name = Butyric anhydride

| ImageFile = Butyric_anhydride.svg

| ImageSize = 150px

| ImageName = Butyric Anhydride

| PIN = Butanoic anhydride

| OtherNames = Butyric anhydride
Butanoyl butanoate
Butanoic acid anhydride
Butyric acid anhydride
Butyryl oxide

|Section1={{Chembox Identifiers

| CASNo = 106-31-0

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

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

| UNII = A88LE742VX

| PubChem = 7798

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 7510

| SMILES = CCCC(OC(CCC)=O)=O

| StdInChI = 1S/C8H14O3/c1-3-5-7(9)11-8(10)6-4-2/h3-6H2,1-2H3

| StdInChIKey = YHASWHZGWUONAO-UHFFFAOYSA-N

}}

|Section2={{Chembox Properties

| C=8

| H=14

| O=3

| Appearance = Clear liquid

| Density = .967 g/cm³

| MeltingPtC = −75

| MeltingPt_notes =

| BoilingPtC = 198

| BoilingPt_notes =

| RefractIndex = 1.413

}}

|Section3={{Chembox Hazards

| ExternalSDS = [http://www.coleparmer.com/catalog/Msds/96914.htm]

}}

|Section8={{Chembox Related

| OtherFunction_label = acid anhydrides

| OtherFunction = Acetic anhydride
Propionic anhydride
Valeric anhydride

| OtherCompounds = Butyric acid
Butyryl chloride

}}

}}

Butyric anhydride or butanoic anhydride is the chemical compound with the formula (CH₃CH₂CH₂CO)₂O. The molecule can be described as a condensation of two molecules of butyric acid with elimination of one water molecule (hence its name).

Butyric anhydride is a clear colorless liquid that smells strongly of butyric acid, which is formed by its reaction to moisture in the air.