I keep finding Acetic Acid available from peptide companies that is 50mM and I always understood that 100mM was the way to go. It is nice that AA is becoming more readily available, but why is it 50mM? Is that usable?
I understood that 100mM (0.6% AA) was the ideal concentration for preserving IGF. As for other peptides, they will most likely have different requirements. 50mM is probably better than no AA at all e.g. (sterile/bacteriostatic water).