Why we sell it separately
It would be easy to put a fixed amount of solvent in every box. We do not, and the reason is straightforward: the volume you add is what sets your concentration. Deciding that for you would be making a protocol decision on your behalf, which is exactly the thing a supplier should not do.
Bacteriostatic water differs from sterile water in one respect that matters here: it contains benzyl alcohol, which suppresses bacterial growth. That is what makes a vial you open more than once workable rather than a single-use item.
If you want the arithmetic done for you, the calculator converts a vial size and a solvent volume into a concentration. It calculates; it does not advise.
What you need alongside a vial
- Bacteriostatic water, in the volume your concentration requires
- Alcohol swabs for the septum
- A syringe with graduations fine enough to read your volume
- Somewhere cold and dark, and a pen to write the date on the label
We stock the solvent. Swabs and syringes are laboratory consumables you will already have a supplier for.
What we stock
One item, and it is the one the rest of the catalogue depends on.
Handling and arithmetic
Three pages that cover what happens after the box arrives.
Bacteriostatic water
What benzyl alcohol changes, how it differs from sterile water, and how long an opened bottle lasts.
Read ToolPeptide calculator
Vial size in, solvent volume in, concentration out. Arithmetic only, with no recommendations attached.
Read PracticeUsing a peptide pen
For the formats that arrive ready to use, and what storage does to reproducibility across a series.
ReadAbout solvent and storage
The practical questions that follow a first order.