Butyric anhydride

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

Names
Preferred IUPAC name Butanoic anhydride
Other names Butyric anhydride Butanoyl butanoate Butanoic acid anhydride Butyric acid anhydride Butyryl oxide
Identifiers
CAS Number	106-31-0 Y
3D model (JSmol)	Interactive image
ChemSpider	7510 Y
ECHA InfoCard	100.003.077
PubChem CID	7798
UNII	A88LE742VX Y
CompTox Dashboard (EPA)	DTXSID8026729
InChI InChI=1S/C8H14O3/c1-3-5-7(9)11-8(10)6-4-2/h3-6H2,1-2H3 Key: YHASWHZGWUONAO-UHFFFAOYSA-N
SMILES CCCC(OC(CCC)=O)=O
Properties
Chemical formula	C8H14O3
Molar mass	158.197 g·mol−1
Appearance	Clear liquid
Density	.967 g/cm3
Melting point	−75 °C (−103 °F; 198 K)
Boiling point	198 °C (388 °F; 471 K)
Refractive index (nD)	1.413
Hazards
Safety data sheet (SDS)	[1]
Related compounds
Related acid anhydrides	Acetic anhydride Propionic anhydride Valeric anhydride
Related compounds	Butyric acid Butyryl chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

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

Safety

Butyric anhydride is a combustible, corrosive liquid. It is considered water sensitive.