Peptides purified by preparative HPLC typically leave the column as TFA salts. Salt exchange to acetate reduces residual trifluoroacetate.
Acetate salt is the common choice for formulation work; TFA-free specifications set an explicit residual limit verified on the COA.
When requesting a quote, state the counterion, residual TFA limit and analytical method you need so the batch COA matches your acceptance criteria.
Compounds in this article
