FAQ
Frequently Asked Questions
Everything you need to know about PureBac bacteriostatic water — from formulation to testing to storage.
About The Product
What is bacteriostatic water?
Bacteriostatic water is sterile water that contains a small concentration of benzyl alcohol (0.9%, or 9 mg/mL) as a preservative. The benzyl alcohol inhibits the growth of most bacteria, which allows the vial to be safely accessed multiple times over a period of up to 28 days. This makes it the preferred solvent for multi-dose reconstitution protocols, as opposed to sterile water for injection, which must be discarded after a single use.
How is PureBac different from regular sterile water?
What is benzyl alcohol and is it safe?
Is PureBac bacteriostatic water USP grade?
Testing & Quality
What does your 7x testing protocol include?
Every batch of PureBac undergoes independent testing across seven quality markers: Purity, Identity, Net Content, Heavy Metals, Endotoxins, Sterility, and Variance (Conformity). Full results are documented in a Certificate of Analysis (COA) that is publicly accessible by lot number on our website.
Where can I find the Certificate of Analysis for my order?
Who conducts your testing?
What endotoxin limit does PureBac meet?
Usage & Storage
How long does a vial last after opening?
Once punctured, a vial of PureBac bacteriostatic water should be stored in the refrigerator (2–8°C / 36–46°F) and used within 28 days. After 28 days, the vial should be discarded, even if solution remains.
How should I store an unopened vial?
Can I use PureBac to reconstitute any peptide?
Why do you offer both 3mL and 10mL sizes?
Ordering & Shipping
Do you offer bulk pricing?
Yes. We offer volume pricing for laboratories and researchers who need consistent, recurring supply. Contact us at wholesale@purebac.com to discuss your requirements.
