Your Molecular Formula

List of allowed groups

Apply Gaussian:
Reference version:

(Peak Full Width at Half-Maximum)

Resolution = M / ΔM


List possible Molecular Formula

This tool allows to generate a list of molecular formulas based on a mass range.

Specify the mass range

Mass range: to

Optional: Filter the result based on the molecular formula

Allowed Molecular Formula range in the format Xn-mYo-p (ex. C1-10H1-15B2):

The number of insaturations can be taken into account if only the following elements are allowed : H, C, O, N, F, Cl, Br, I. It is defined as ((2*nC - nH - nCl- nF - nI - nBr + nN) / 2) +1.
Limit the results by unsaturations: to

Allow only integer unsaturation values: