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The ChemCalc toolbox

Molecular formula finder from monoisotopic mass

List of possible molecular formulas

Compounds for a molecular formula

Peptide and protein fragmentation calculator

Nucleotide and oligonucleotide fragmentation calculator

Polymer mass distribution calculator

Mass spectra database search

In-silico MS/MS fragmentation of a structure

Atomic elements and isotope reference table

Chemical group abbreviations

Publications and literature

ChemCalc Web Services and API

ChemCalc documentation

Mass spectrometry exercises

Determine the charge state — mass spectrometry exercises
Find the monoisotopic mass — mass spectrometry exercises
Determine the composition from the isotopic distribution
Determine the molecular formula — mass spectrometry exercises
Match spectra and molecules — electron-impact exercises

ChemCalc news

The ChemCalc newsletter

Cite ChemCalc — Patiny L, Borel A. ChemCalc: a building block for tomorrow's chemical infrastructure. J Chem Inf Model. 2013. DOI: 10.1021/ci300563h

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