Peptide Research Lab Supplies Australia

What each item is for

Every item in this range serves one step: getting a lyophilised peptide into a measured, labelled solution without contaminating it. The table sets out contents and storage as listed for each product.

Choosing between them

• Peptides already on hand, diluent needed. Buy bacteriostatic water alone. The 3 × 10 mL pack makes sense when vials will be opened at different times, because each diluent vial's in-use period starts at its own first puncture.
• Setting up a bench for the first time. The Research Starter Kit gives twenty swabs for ten syringes, since each transfer pierces two septa: the diluent vial's and the peptide vial's.
• Starting from nothing. The Complete Research Bundle shares one diluent vial between two peptides. A fresh syringe for every 1 mL diluent draw avoids carrying one compound back into the shared vial; the bundle page works through the syringe and volume budget.
• Supplying other laboratories. The Brand Starter Kit is a business-to-business trade kit. White-label peptides explained and the wholesale supplier guide cover labelling, documentation and trade supply, and larger orders go through the wholesale page.

Bacteriostatic or sterile water?

The choice turns on whether the stock will be sampled repeatedly and whether benzyl alcohol could confound the assay. At 0.9%, benzyl alcohol is 9 mg/mL, about 83 mM, and it dilutes along with the peptide: 8.3 mM after a 1:10 dilution and 0.83 mM after 1:100. Published work has reported cytotoxicity, membrane fluidisation, shifts in cAMP signalling and effects in a rat tendon-repair model at concentrations in or near these ranges; the bacteriostatic water monograph gives the details and sources.

What is bacteriostatic water explains the preservative, and bacteriostatic water vs sterile water compares the two in depth.

Handling notes that apply across the range

• Swab properly. Wipe each septum back and forth, or use a fresh face of the swab for each wipe, and let the alcohol dry before puncturing. The starter kit page cites the comparison behind this.
• Use enough of the barrel. Syringe error rises when less than about 20% of capacity is measured, so on a 1 mL syringe keep draws at 200 µL or more and use a micropipette or an intermediate dilution below that.
• One needle, one entry. A fresh sterile needle for every entry into a shared diluent vial prevents carry-over and contamination.
• Date on first puncture. Write the date on the diluent vial when the seal is first pierced.
• Keep peptides cold and dry. Store lyophilised vials at −20 °C, let them reach room temperature before opening, and split reconstituted stocks into aliquots rather than repeatedly puncturing one vial.

Sterile technique for peptide handling, the peptide storage guide and how lyophilisation works cover each point in more depth.

The calculations

The reconstitution calculator turns vial mass and diluent volume into a concentration and a per-aliquot volume in µL. The dilution calculator applies C1V1 = C2V2, which also gives the benzyl alcohol carried into a working solution when 9 mg/mL is entered as the starting concentration. The molarity calculator converts mass to molar units once a molecular weight is fixed, and peptide molarity calculations explains the net peptide content correction.