Maleic anhydride(108-31-6) IR2
Product NameMaleic anhydride
CAS108-31-6
Molecular FormulaC4H2O3
Molecular Weight98.06
InChIInChI=1S/C4H2O3/c5-3-1-2-4(6)7-3/h1-2H
InChIKey FPYJFEHAWHCUMM-UHFFFAOYSA-N
SmilesO1C(=O)C=CC1=O
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MassMS-NW-1870 maleic anhydride C4H2O3 (Mass of molecular ion: 98)
Source Temperature: 240 °C Sample Temperature: 180 °C Reservoir, 75 eV
12.0 1.7 13.0 3.3 14.0 1.3 24.0 3.0 25.0 12.7 26.0 95.5 27.0 2.8 28.0 6.2 29.0 2.6 36.0 1.4 37.0 1.6 41.0 3.6 44.0 4.1 52.0 2.3 53.0 10.2 54.0 100.0 55.0 3.5 98.0 20.3
parameter in CDCl3
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1H NMR 300 MHz C4 H2 O3 0.02 ml : 0.5 ml CDCl3 maleic anhydride 
Parameter ppm Hz
D(A) 7.048
Hz ppm Int.2114.40 7.048 1000
in CDCl3
KBr disc
nujol mull
4880 A,200 M,powder
