Reconstitution and Long-Term Storage Protocols for SS-31 Research Peptide in the Laboratory
Research Notice: This article covers research on SS-31 research peptide and MOTS-C research peptide — available from Palmetto Peptides for laboratory use only.
Research Disclaimer: SS-31 is sold by Palmetto Peptides strictly as a research compound for in vitro and laboratory use only. It is not intended for human or veterinary consumption, administration, or therapeutic use.
Proper SS-31 handling directly affects concentration accuracy, structural integrity, and biological activity of working solutions. Researchers can purchase SS-31 research peptide from Palmetto Peptides — every lot ships as lyophilized powder with a full COA. For related handling guidance, see BPC-157 and TB-500 reconstitution and storage research.
Understanding Your SS-31 Starting Material
Before reconstituting, confirm COA details: HPLC purity (ideally ≥98%), mass spectrometry confirmation (expected MW ~639.80 g/mol, formula C32H49N9O5), and peptide content percentage. Peptide content accounts for residual water and TFA counterions — essential for accurate concentration calculations.
Step-by-Step Reconstitution Protocol
Step 1: Workspace
Work in a laminar flow hood with sterile, endotoxin-free consumables for cell culture applications. Allow the sealed vial to reach room temperature (15-30 min) before opening.
Step 2: Calculate Stock Concentration
Example: 1 mg SS-31 (MW 639.80 g/mol) target 1 mM stock requires 1.563 mL solvent. Adjust for peptide content percentage from COA.
Step 3: Solvent Selection
| Solvent | Use Case |
|---|---|
| Sterile ultrapure water | General stock — preferred first choice |
| Sterile PBS pH 7.4 | Cell-based assay stocks |
| 10 mM HEPES buffer pH 7.4 | Isolated mitochondria assays |
Avoid DMSO — unnecessary given SS-31 water solubility and may confound membrane potential assays.
Step 4: Aliquot and Store
Aliquot into single-use volumes in amber or foil-wrapped tubes. Store at -80C. Maximum 3 freeze-thaw cycles for reconstituted solutions.
Storage Conditions Summary
| Form | Storage | Stability |
|---|---|---|
| Lyophilized powder | -20C or -80C, desiccated, dark | 24 months or per COA |
| Reconstituted stock | -80C, single-use aliquots, dark | 6-12 months |
| Working solution | 4C, dark, same day | 24-48 hours max |
Related: NAD+ peptide storage guidance, MOTS-C research, cellular health research. Order SS-31 research peptide here.
Frequently Asked Questions
What solvent to use?
Sterile ultrapure water or PBS pH 7.4. Avoid DMSO.
How to store long-term?
Lyophilized at -20C/-80C desiccated dark; reconstituted stocks at -80C in single-use aliquots.
Max freeze-thaw cycles?
3 cycles maximum.
See Also: SS-31 Research Peptide: Complete Guide