We Don't Guess.
We Test. Seven Times.
Most bacteriostatic water suppliers conduct minimal quality checks. PureBac runs a 7-point testing protocol on every batch — because a single point of failure is one too many.
Why Testing Matters
Endotoxin Contamination
Heavy Metal Contamination
Incorrect Benzyl Alcohol Concentration
Microbial Contamination
PureBac eliminates each of these risks through independent, documented testing.
The 7-Point Protocol
What We Test – and Why It Matters
Purity
We verify that the water base meets USP (United States Pharmacopeia) standards for Water for Injection. This confirms the absence of organic and inorganic impurities that could interfere with your research compounds.
Identity
We confirm the exact identity and concentration of benzyl alcohol in the formulation. PureBac contains 0.9% (9 mg/mL) benzyl alcohol — the established standard for bacteriostatic preservation — and we verify this on every batch.
Net Content
We confirm that every 3mL vial contains 3mL and every 10mL vial contains 10mL. Volume accuracy matters when you are calculating precise reconstitution ratios.
Heavy Metals
Using inductively coupled plasma (ICP) analysis, we screen every batch for the presence of heavy metals including lead (Pb), arsenic (As), mercury (Hg), and cadmium (Cd). All results must fall below USP limits.
Endotoxins
We conduct Limulus Amebocyte Lysate (LAL) testing to confirm that every batch is non-pyrogenic. The endotoxin limit for Water for Injection is 0.25 EU/mL — a threshold we verify on every lot.
Sterility
Variance (Conformity)
Certificates Of Analysis
Your Proof Is One Click Away.
Every batch of PureBac bacteriostatic water is assigned a unique lot number. You can access the full Certificate of Analysis for your specific batch directly on our website — no account required, no request form to fill out.
- QR Code on label
- LOT Number
