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The Bench Notes · Bench basics

10mL, 30mL or the 5 pack. Match the format to the work.

Bacteriostatic water comes in three useful shapes, and choosing wrong either wastes ampoules or stretches a vial past its best days. The rule is simple: match the format to how often you enter a vial.

September 2026 · 6 min read

10mL ampoule: one entry, zero risk

A sealed 10mL ampoule covers a single reconstitution. You break, draw, done. There is no storage decision, no refrigeration question, no multi-entry contamination risk. For one-off protocols it is the cleanest format that exists.

30mL vial: the workhorse

The 30mL multi-dose vial suits ongoing work: refrigerate after first entry and withdraw over weeks. The preservative does the protective work between entries; your technique does the rest. One vial serves a full protocol cycle.

5x10mL pack: the bench supply

The five pack is ten 1mL decisions deferred. Every reconstitution gets its own sealed ampoule, at a price under five singles. For a shared bench or a multi-vial study it removes the multi-entry question entirely.

The quick math

One reconstitution: 10mL ampoule. Ongoing protocol, frequent entries: 30mL vial. Regular bench use or multiple vials in play: 5x10mL pack. All three ship from Perth at $15 flat, free over $150.

Common questions

How many reconstitutions from a 30mL vial?
That depends on your per-protocol volume, but the vial is designed for repeated aseptic entry over several weeks when refrigerated.
Is the 5 pack cheaper per ampoule?
Yes. Five sealed 10mL ampoules at $20 saves $5 against five singles, and each ampoule stays single-use sealed until opened.
Do unopened ampoules expire?
Sealed ampoules carry a use-by date on the batch documentation. Store away from light at room temperature until opened.

Batch documented bac water, dispatched from Perth

10mL ampoules $5, 30mL vials $30, 5x10mL packs $20. $15 flat shipping Australia wide, free over $150.

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