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Convert between peptide salt forms (TFA, acetate, HCl, free base). See how counterions affect actual peptide content.
CH₃COO⁻ counterion, ~5% by weight
Pure peptide, no counterion
Active peptide in 5mg of Acetate (TFA-free)
4.75 mg
(95% peptide content)
Equivalent amount as Free base (no salt)
4.75 mg
(100% peptide content in target form)
MW-based conversion
Total MW (Acetate (TFA-free)): 1478.5 Da
Total MW (Free base (no salt)): 1419.5 Da
Conversion factor: 0.9601
5mg × 0.9601 = 4.80 mg
Salt content percentages are typical estimates. Actual counterion content varies by vendor and batch. Check COA for exact values. For research purposes only.