What Water to Mix With Peptides
Choosing the right solvent is critical for peptide reconstitution. This guide covers the most common options and when to use each one.
Reconstitution Solvents
The solvent you choose for peptide reconstitution directly impacts stability, solubility, and experimental results. Here are the most common options used in research settings.
Reconstitution Technique
Follow these steps for proper peptide reconstitution in a research setting.
Allow peptide to reach room temperature
Remove the vial from cold storage and let it equilibrate to room temperature for 15-20 minutes. This prevents condensation from entering the vial when opened and ensures even dissolution.
Add solvent slowly along the vial wall
Using a sterile syringe, add your chosen solvent slowly against the inside wall of the vial -- not directly onto the lyophilized cake. This prevents foaming and protein aggregation from mechanical stress.
Swirl gently -- never vortex
Allow the peptide to dissolve by gently swirling or rolling the vial between your palms. Never vortex or shake aggressively. Most peptides will dissolve within 1-5 minutes. If not fully dissolved, let it sit and swirl again.
Verify the solution is clear
A properly reconstituted peptide solution should be clear and colorless. If the solution remains cloudy or has visible particulates, the peptide may be damaged or the wrong solvent was used.
Aliquot and store
Divide the reconstituted solution into single-use aliquots. Store at 2-8°C for short-term use (2-4 weeks) or -20°C for longer storage. Label each aliquot with the peptide name, concentration, date, and lot number.
Pre-Formulated Nasal Sprays
Stemcode Peptides nasal sprays are pre-formulated and ready to use -- no reconstitution required. Each spray is prepared with:
- Normal Saline (pH 6.0) as the base solution
- Benzalkonium Chloride (BKC) as a preservative to inhibit microbial growth
- Lab-grade distilled water for consistent purity
This eliminates the variability introduced by manual reconstitution and provides optimized stability from the manufacturer.
Need Help With Reconstitution?
Use our free peptide reconstitution calculator to turn your vial amount and bacteriostatic water into exact syringe units — or reach out with any solvent or concentration questions.
