Laboratory solution preparation guide

Work in a clean laboratory environment wearing appropriate personal protective equipment. Allow the sealed vial to reach room temperature before opening to prevent condensation inside the vial, which can affect peptide stability.

Select a solvent using the compound-specific laboratory protocol and supported product documentation. Solubility, pH, solvent compatibility and assay requirements vary by material. Do not assume water or bacteriostatic water is suitable for every peptide.

1. Calculate the required solvent volume using our peptide reconstitution calculator. 2. Transfer the calculated solvent volume into the vial using an appropriate calibrated laboratory liquid-transfer device under suitable aseptic conditions. 3. Gently introduce the solvent down the side of the vial — avoid directing the flow straight onto the lyophilised powder. 4. Gently swirl the vial to dissolve. Do not shake vigorously, as this can denature the peptide. 5. Inspect for complete dissolution; if any powder remains, allow the vial to sit for a few minutes and swirl again.

There is no universal refrigerated shelf life or freezing protocol for reconstituted peptides. Follow stability data for the exact compound, formulation, solvent and concentration and your validated laboratory protocol. If these are unavailable, obtain them before preparing or storing a solution. Where supported, use aliquots to minimise repeated freeze-thaw cycles. Label containers with the compound, batch, concentration and preparation date.

Our peptide reconstitution calculator takes three inputs: the vial amount (in milligrams), the solvent volume (in millilitres), and a target research quantity (in micrograms or milligrams). From these values it calculates the resulting concentration (mg/mL and µg/mL) and the laboratory solution volume required for the target quantity. The calculator performs mathematical conversions only — it does not recommend quantities or preparation protocols.

Concentration (mg/mL) = vial amount (mg) ÷ solvent volume (mL). Concentration (µg/mL) = concentration (mg/mL) × 1000. Solution volume (mL) = target quantity (mg) ÷ concentration (mg/mL). For example, a 5 mg vial reconstituted with 2 mL of solvent gives a concentration of 2.5 mg/mL (2500 µg/mL). A target research quantity of 250 mcg (0.25 mg) corresponds to a required solution volume of 0.1 mL (100 µL).

All solution preparation and handling should be performed in accordance with your laboratory safety protocols. Research peptides are supplied for in-vitro laboratory research only and are not intended for human use or consumption.