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PuriLab Analytical
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Bacteriostatic Water Analysis

Benzyl alcohol concentration and pH, measured and reported on a signed certificate.

$150$110
Founding rate, limited time
per sample

What you get

Confirms the preservative is benzyl alcohol
Measures benzyl alcohol concentration as % w/v
Compares the measured figure against the labelled claim
Measures pH
Signed certificate with a code anyone can verify

Price is per sample, one vial and one report. Testing 3 vials? Set the quantity to 3.

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Method & specs

How the test is run.

Method
Chromatographic separation with UV detection, quantified against a gravimetrically prepared working standard. pH by calibrated glass electrode
Turnaround
3 to 5 business days
Reported as
Benzyl alcohol as % w/v, against the labelled claim, plus pH

How much to send

Any one of these is enough.

Send the sample in whatever form it is already in. No preparation needed. More than the minimum is welcome; the extra lets us re-run the analysis if anything looks off.

Unopened vial
One
or Liquid
2 mL minimum

Also known as

Same compound, different names.

This compound is sold under several names. If your label shows any of these, it is the same test.

Bacteriostatic waterBAC waterBenzyl alcohol

Your sample

What happens to it.

What if you can't run my sample?
If the compound falls outside our validated scope we tell you before running anything, and you are not charged. For anything unusual, email us first at admin@purilab.org.
Do I get my sample back?
No. Remaining material is destroyed after analysis and the certificate is issued.
Do you ever withhold a result?
No. The certificate reports what the analysis found, whether or not it matches the label claim. Results are never altered or suppressed at a client request.
Can I stay anonymous?
Yes. You choose at checkout whether your certificate is published or kept private. Your name is never printed on a published certificate, and a private certificate is released only to you.

Not covered

This test answers what's in your vial and how much. It is not a safety test.

Sterility. We do not test whether a sample is safe to inject
Bacterial endotoxins
Heavy metals
Purity. Area percent of a dilute aqueous solution does not characterize the dissolved preservative
Anything other than benzyl alcohol concentration and pH

Not sure what happens next?

Walk through every step from the moment you ship your vial to the moment your signed report lands.