ChemCalc
You entered: C20H12N4Na2O6S2 . xH2O
The formula is: C20H12N4Na2O6S2.nH2O
The compound seems to be a salt or a hydrate.
The mass of C20H12N4Na2O6S2.nH2O is not defined
Mass of C20H12N4Na2O6S2: 514.43802
Mass of H2O: 18.01528
Isotopic distribution