ChemCalc
You entered: C13H11N3 . 0.5H2SO4 . xH2O
The formula is: C13H11N3.0.5H2O4S.nH2O
The compound seems to be a salt or a hydrate.
The mass of C13H11N3.0.5H2O4S.nH2O is not defined
Mass of C13H11N3: 209.25044
Mass of H2O4S: 98.07348
Mass of H2O: 18.01528
Isotopic distribution