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Tools
Four calculators for everyday peptide work. They run in your browser, send nothing anywhere and need no account.
Peptide molecular weight calculator
Paste a sequence and get its empirical formula, average mass and monoisotopic mass.
CAS number check digit validator
Paste a CAS Registry Number and see whether its check digit adds up.
Peptide isoelectric point calculator
Paste a sequence and get its theoretical pI and net charge across the pH range.
Certificate of analysis checklist
Seven checks you can make on a certificate before paying. Tick them off against the document in front of you.