Key takeaways
- Calculate diluent volume first: one 30 mL container of bacteriostatic water supplies 2 mL to fifteen vials.
- Count sterile 10 mL glass vials by aliquot, including controls and an archive aliquot, then add a margin for breakage.
- Record the peptide lot, diluent lot and vial lot together so a prepared solution traces back to its certificate of analysis.
- Order peptides and consumables in one parcel; peptide vials ship in cold-chain packaging with desiccant from Vancouver.
- Keep bacteriostatic water and glass vials at controlled room temperature in their original packaging.
What the consumables side covers
The consumables in our /product-category/lab-supplies/ range are 30 mL bacteriostatic water and sterile 10 mL glass vials. Both are laboratory items ordered alongside the lyophilized peptides in our /product-category/research-peptides/ catalogue, and both ship with lot documentation from Vancouver.
Choosing between quantities is mostly arithmetic. The number of vials of solvent and the number of empty glass vials follow from how many peptide lots are in the freezer and how a laboratory prefers to aliquot working volumes in vitro.
This guide covers three things: matching solvent volume to vial count, matching glass vial capacity to the volumes handled at the bench, and keeping lot records that tie a prepared solution back to a certificate of analysis.
Why 30 mL bacteriostatic water
Bacteriostatic water is water for laboratory use containing 0.9% benzyl alcohol as a bacteriostatic agent. The 30 mL format is a working size: large enough to serve several vials, small enough that a laboratory is not holding an opened container for months.
The arithmetic is simple. A 30 mL container supplies 2 mL of diluent to fifteen separate vials, or 5 mL to six. Laboratories working through peptide lots quickly may prefer one 30 mL container per project; laboratories running a single in-vitro assay per quarter may find the same container covers the whole period.
Two points are worth recording in the bench log. First, the date the container is first opened. Second, the volume drawn each time, so that the remaining volume is known without holding the container up to the light.
Sterile 10 mL glass vials and headspace
Our sterile glass vials hold 10 mL. Capacity is not the same as fill volume. A 10 mL vial is normally filled well below its nominal capacity so that there is headspace for swirling, for a stopper seal, and for labelling without the liquid meniscus sitting at the shoulder.
Glass is the usual choice for peptide solutions in vitro because it is non-porous and does not shed plasticiser. The 10 mL size also suits aliquoting: a single prepared solution can be divided into several vials so that one aliquot is handled at a time and the rest stay closed.
Vial counts are easy to underestimate. A laboratory preparing one solution and splitting it four ways needs five vials, not one. Blanks, controls and a retained archive aliquot each occupy a vial as well.
Planning an order in five steps
1. List the peptide lots on hand
The purchaser lists each peptide in the freezer by name, vial size (5 mg or 10 mg) and lot number. This list is the basis for every other number in the order.
2. Set the working volume per vial
Researchers determine the volume of diluent intended per vial for their in-vitro protocol, then multiply by the number of vials. A result of 18 mL points to one 30 mL container; a result of 42 mL points to two.
3. Count aliquots, not solutions
The laboratory counts the number of separate glass vials each prepared solution will be divided into, including any archive aliquot, and sums across all peptide lots.
4. Add a margin for breakage and repeats
Glass breaks and assays are repeated. A modest margin above the calculated vial count avoids a second order mid-project. The margin is a local decision; many laboratories add one or two vials per project.
5. Confirm the lot documentation needed
Purchasing officers confirm which certificates of analysis the internal record system requires before the order is placed, so that the downloadable documents can be filed on arrival rather than chased later.
Quantity worked examples
| Scenario | Peptide vials | Diluent volume assumed | 30 mL containers | 10 mL glass vials |
|---|---|---|---|---|
| Single in-vitro assay | 2 | 2 mL each | 1 | 6 |
| Small comparison study | 6 | 2 mL each | 1 | 18 |
| Multi-peptide screen | 10 | 3 mL each | 1 | 30 |
| Shared core facility, one quarter | 20 | 3 mL each | 2 | 60 |
These figures are illustrative arithmetic, not a protocol. Each laboratory sets its own volumes and aliquot counts.
Lot records that hold up to audit
Every lot we ship carries a downloadable certificate of analysis stating identity, purity and test method. Purity on peptide lots is reported by third-party HPLC, with identity confirmed by mass spectrometry. Consumable lots carry their own lot identifiers.
A usable record ties four things together:
- Peptide lot number and the certificate of analysis filed against it.
- Diluent lot and the date the container was opened.
- Glass vial lot for the vials holding the prepared solution.
- Date and volume of each aliquot prepared, with the initials of the person preparing it.
Recording the diluent and vial lots is the step laboratories most often skip. Without it, a questioned result cannot be traced past the peptide itself. With it, a single line in the log points to three documents.
Packaging, shipping and storage
Orders ship with tracked shipping from Vancouver. Peptide vials travel in cold-chain packaging with desiccant. Consumables ship in the same parcel, so a laboratory can order 5 mg or 10 mg peptide vials, 30 mL bacteriostatic water and sterile 10 mL glass vials together rather than reconciling three arrivals.
Prices across the catalogue run from $24.99 to $219.99 CAD. Ordering is limited to laboratories and qualified researchers, and delivery addresses are institutional or commercial premises in Canadian provinces.
On arrival, the practical sequence is short: check the parcel contents against the packing list, download the certificate of analysis for each peptide lot, record the consumable lot numbers, and move the peptide vials to their specified storage. Store bacteriostatic water and sterile glass vials at controlled room temperature, away from direct light, in their original packaging until the point of use.
For laboratory research use only. Not for human or veterinary use.