Formic anhydride

Formic anhydride
Names
	Preferred IUPAC name Formic anhydride
	Other names Methanoic anhydride; Formyloxymethanone
Identifiers
CAS Number	1558-67-4 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	1901016
ChEBI	CHEBI:36657;
ChemSpider	7827603 ;
Gmelin Reference	1041427
PubChem CID	9548680;
UNII	DG7TRR6KVW ;
CompTox Dashboard (EPA)	DTXSID10429526 ;
	InChI InChI=1S/C2H2O3/c3-1-5-2-4/h1-2H Key: VGGRCVDNFAQIKO-UHFFFAOYSA-N ;
	SMILES O=COC=O;
Properties
Chemical formula	C2H2O3
Molar mass	74.035 g·mol−1
Appearance	Colorless gas
Boiling point	24 °C (75 °F; 297 K) at 20 mmHg
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Formic anhydride, also called methanoic anhydride, is an organic compound with the chemical formula C
₂H
₂O
₃ and a structural formula of (H(C=O)−)₂O. It can be viewed as the anhydride of formic acid (HCOOH).