Why not just use your vendors bac water?
Why buy Hospira or search high low for phizer etc... I don't know...
I do the same but after reading this makes me wonder
From Chatgpt
Does it take water to make peptides from raw materials?
Yes. Absolutely
If you're starting with peptide raw powder, you typically need a solvent to dissolve it before use.
The most common options are:
Bacteriostatic water – sterile water containing a small amount of benzyl alcohol to inhibit bacterial growth. This is the standard choice for most multi-dose peptide vials.
Sterile water for injection – sterile but contains no preservative, so it is generally intended for immediate use or single-use situations.
Some peptides may require a small amount of a special solvent (such as acetic acid solution) to fully dissolve before adding water, but this depends on the specific peptide.
If you're manufacturing or compounding peptides from raw materials, there are also requirements for sterile processing, filtration, testing, and aseptic handling beyond simply adding water.