A contract research organization is audited by its clients, and its consumables are part of the audit. For a material as basic as bacteriostatic water, the questions are always the same: which lot, what did it test at, was it the same lot throughout the study, and where is the paperwork. This guide covers how to be able to answer them without a scramble.
Supplier qualification
Treat the water supplier like any other qualified vendor. Before the first study order, obtain and file: the product specification; a sample certificate of analysis; the supplier's business address, contact details and shipping origin; and its return and complaint handling terms. Confirm that COAs will be supplied per lot and that the supplier can commit single-lot quantities for a study on request. Criteria are in vetting a supplier. Record the qualification and review it annually.
Specification on the purchase order
Sterile water, 0.9% benzyl alcohol, endotoxins below 0.5 EU/mL, pH 4.5 to 7.0, sealed multi-use vials, lot and expiration on each vial, lot-specific COA per shipment, minimum remaining shelf life, single lot where stated. A purchase order carrying this language is itself an audit document.
Lot consistency across a study
Estimate the study's total volume, add a margin for repeats, and reserve the lot before the study starts; a supplier who confirms single-lot availability in writing removes the risk of a mid-study change. If a lot change is unavoidable, document it as a planned change with the date, the new lot's COA, and any bridging check the protocol requires. Small vials make it easier to dedicate a lot to a study without opening large volumes; see choosing a vial size.
Records that survive an audit
- Receipt: inspection outcome, lot, expiration, quantity, date, inspector, COA reference. See inspection.
- Storage: location, temperature monitoring, excursion records.
- Issue: which lot went to which study and bench, when.
- Use: lot number in every preparation record; first-puncture dates on vials.
- Disposal: discard dates and quantities.
- Deviations: any rejected vial, quarantine, or supplier complaint, with resolution.
The SOP template generates all of these as a matter of course, and lot traceability explains the chain.
Change notification
Ask the supplier to notify you of changes to container material, preservative source, manufacturing site or test methods. A change in vial material from glass to plastic, for example, is invisible on the bench and material to a client that validated on glass.
Replenishment discipline
Stock-outs on a study are worse than waste. Hold a defined minimum stock for active studies, reorder at a trigger level, and prefer a domestic supplier with short, predictable lead times so that the buffer can be small. Shipping and receiving considerations are in how bacteriostatic water is shipped.
What to tell a client
That bacteriostatic water is purchased against a written specification from a qualified supplier, received with a lot-specific COA, stored at controlled room temperature, issued by lot, dated at opening and discarded at 28 days, and fully traceable from shipment to preparation record. A CRO that can say that, and produce the file, has answered the audit.
BAC Water Supply supplies batch documentation on request, confirms single-lot availability for stated quantities, and handles recurring CRO volume through the bulk and wholesale program. Institutional requisition language is in buying for institutional labs.
All BAC Water Supply products are supplied for laboratory research use only and are not for human or veterinary use.