Maleic anhydride

Maleic anhydride
Names
	Preferred IUPAC name Furan-2,5-dione
	Other names Maleic anhydride; cis-Butenedioic anhydride; 2,5-Furanedione; Maleic acid anhydride; Toxilic anhydride
Identifiers
CAS Number	108-31-6 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	106909
ChEBI	CHEBI:474859 ;
ChEMBL	ChEMBL374159 ;
ChemSpider	7635 ;
ECHA InfoCard	100.003.247
EC Number	203-571-6;
Gmelin Reference	2728
PubChem CID	7923;
RTECS number	ON3675000;
UNII	V5877ZJZ25 ;
UN number	2215
CompTox Dashboard (EPA)	DTXSID7024166 ;
	InChI InChI=1S/C4H2O3/c5-3-1-2-4(6)7-3/h1-2H Key: FPYJFEHAWHCUMM-UHFFFAOYSA-N ; InChI=1/C4H2O3/c5-3-1-2-4(6)7-3/h1-2H Key: FPYJFEHAWHCUMM-UHFFFAOYAP;
	SMILES C1=CC(=O)OC1=O;
Properties
Chemical formula	C4H2O3
Molar mass	98.057 g·mol−1
Appearance	White crystals or needles
Odor	irritating, choking
Density	1.48 g/cm3
Melting point	52.8 °C (127.0 °F; 325.9 K)
Boiling point	202 °C (396 °F; 475 K)
Solubility in water	Reacts
Vapor pressure	0.2 mmHg (20°C)
Magnetic susceptibility (χ)	−35.8·10−6 cm3/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H314, H317, H334, H372
Precautionary statements	P260, P261, P264, P270, P272, P280, P285, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P304+P341, P305+P351+P338, P310, P314, P321, P330, P333+P313, P342+P311, P363, P405, P501
NFPA 704 (fire diamond)	3 1 1
Flash point	102 °C (216 °F; 375 K)
Explosive limits	1.4%-7.1%
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	465 mg/kg (oral, mouse); 850 mg/kg (oral, rat); 875 mg/kg (oral, rabbit); 390 mg/kg (oral, guinea pig); 400 mg/kg (oral, rat)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m3 (0.25 ppm)
REL (Recommended)	TWA 1 mg/m3 (0.25 ppm)
IDLH (Immediate danger)	10 mg/m3
Safety data sheet (SDS)	MSDS at J. T. Baker
Related compounds
Related acid anhydrides	Succinic anhydride
Related compounds	Maleic acid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Maleic anhydride is an organic compound with the formula C₂H₂(CO)₂O. It is the acid anhydride of maleic acid. It is a colorless or white solid with an acrid odor. It is produced industrially on a large scale for applications in coatings and polymers.