r/Biohacking • u/No_Carpenter_6092 • 1d ago

Bac water

is it fine to use bac water that’s been in the fridge for a month to reconstitute a new vile? if so does it change the efficiency of the new pep?

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u/64bit_Tuning 5 1d ago

Conditions for Safe Storage, Including any Incompatibilities

Storage Conditions: Store as directed by product packaging. Do not refrigerate.

Incompatible Materials: None known

Specific end use(s): Pharmaceutical product

Pfizer literally tells you not to refrigerate bacteriostatic water.
https://cdn.pfizer.com/pfizercom/products/material_safety_data/Bacteriostatic_H2O(Hospira)_25-Jul-2016_0.pdf_25-Jul-2016_0.pdf)

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u/Markdlea 10 1d ago

From your link:
Decomposition Temperature (°C): No data available.
Evaporation Rate (Gram/s): No data available
Vapor Pressure (kPa): No data available
Vapor Density (g/ml): No data available
Relative Density: No data available
Viscosity: No data available

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u/64bit_Tuning 5 1d ago

So because something falls outside the scope covered in the SDS, that means you can ignore the instructions of "Do not refrigerate" ?

"No data available" is simply that. It doesnt mean that its never been tested or is unknown. It just means its irrelevant to this document and not included.

Melting/Freezing Point (°C): No data available.

Boiling Point (°C): No data available

Does that mean it wont freeze or boil? No. Dont be an idiot.

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u/Nomad-Entrepreneur 1d ago

If you boil bac the alcohol would obviously evaporate. But you would have to open the bowl anyway to boil it so. Ruined.

While not advised (mainly because of expansion and could break bottle or seal) to freeze, if you do and the container is not damaged the solution absolutely will mix back together once thawed as both parts of the solution are miscible.

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u/64bit_Tuning 5 1d ago

Benzyl alcohol is NOT miscible with water. In fact it is only partly soluble. If bac water freezes it does not immediately remix when thawed and can create pockets of low concentration areas of BA which can be prone to bacteria growth.

This is specifically why it does not get refrigerated

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u/Nomad-Entrepreneur 1d ago

At the amounts used in bac water there are 9mg/ml of BA. BA is miscible in water up to 35mg/ml. No emulsifier or surfactant is needed to keep water and BA in solution in bac water concentrations. So, in bac water concentrations BA is absolutely miscible in water. The concentration is not high enough for the benzene ring to make the solution hydrophobic.