Laboratory Reference Tools
Reconstitution math, diluent planning, unit conversion, and value comparison for lyophilized research peptides. Calculations only — nothing here is a dosing recommendation, and none of these compounds are intended for human or animal use.
Reconstitution Calculator
Enter the peptide mass in the vial and the diluent volume you intend to add. Returns solution concentration, the volume of one aliquot, and where that lands on an insulin-scale syringe.
Enter a vial mass and diluent volume to begin.
1 mL U-100 syringe · 100 graduations · 0.01 mL each
Molecula Diluent — bacteriostatic water, 10 mL, for laboratory reconstitution.
Diluent Planner
Planning several reconstitutions at once? Add each vial and its intended diluent volume to see total diluent required and how many 10 mL Molecula Diluent vials that takes.
Molecula Diluent — bacteriostatic water, 10 mL.
Unit Converter
Convert between mass units, and between mass and molar concentration when the molecular weight is known. Molecular weight appears on the certificate of analysis for each lot.
Serial Dilution Calculator
Solves C₁V₁ = C₂V₂ for a single step, then projects a serial dilution series at the same fold factor. Useful for preparing working stocks from a concentrated reconstitution.
| Step | Concentration | Fold from stock |
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Cost per Milligram
Vial size and price rarely scale together. Enter the options you’re weighing — across sizes, or across suppliers — to see effective cost per milligram side by side.
| Option | Price | Mass | Cost / mg | Vs. best |
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Handling & Storage Reference
General laboratory handling guidance for lyophilized peptides. Individual compounds vary — the certificate of analysis for your lot takes precedence over anything on this page.
Lyophilized powder
−20 °C, desiccated, dark
Freeze-dried peptides are the most stable form and tolerate long-term frozen storage. Keep sealed and dry; ambient humidity is the main enemy. Short transit at room temperature is generally tolerated.
Reconstituted solution
2–8 °C, protected from light
Once in solution, stability drops substantially. Refrigerate immediately after reconstituting and keep the vial out of direct light. Solution stability is compound-specific — check the COA.
Before opening
Equilibrate to room temperature
Let both the vial and the diluent reach room temperature before reconstituting. Opening a cold vial draws condensation into the powder and can degrade it.
Adding diluent
Down the vial wall, no agitation
Direct the stream against the inside wall rather than onto the powder cake. Swirl gently or leave to dissolve; do not shake, which shears peptide chains and denatures the solution.
Freeze–thaw cycling
Aliquot to avoid it
Each freeze–thaw cycle degrades peptide in solution. If long storage is needed, divide into single-use aliquots at the point of reconstitution rather than repeatedly cycling one vial.
Visual inspection
Clear and particulate-free
A properly reconstituted solution is clear. Cloudiness, visible particulate, or colour change indicates the material should not be used for further work.
These tools perform mathematical conversions and provide general laboratory handling reference. They do not constitute dosing, medical, veterinary, or clinical guidance.
Molecula Labs LLC · molecularesearch.com