Acetic Acid Water (Dilute Acetic Acid (Peptide Solvent))
A dilute acetic acid solution used as a solvent to reconstitute peptides that are poorly soluble in plain or bacteriostatic water (for example certain hydrophobic peptides). The mild acidity helps fully dissolve stubborn peptide powders.
How it works
Lowering the pH with dilute acetic acid increases the solubility of peptides that resist dissolving in neutral water, allowing clumped or hydrophobic lyophilized powder to go fully into solution before injection.
Key facts
- Molecular weight: Water + dilute acetic acid
- Half-life: N/A (solvent)
- Bioavailability: N/A (diluent)
- Storage: Room temperature; keep sealed and clean.
Dosing overview
- Typical dose: Small volume to dissolve, then dilute
- Frequency: As needed to reconstitute
- Duration: Per vial use
- Route: Added to peptide vial for injection
Protocol notes
- Used when a peptide will not dissolve in bacteriostatic or sterile water.
- A small amount of dilute acetic acid is added to dissolve the powder, then the volume is brought up with bacteriostatic water.
- Only very dilute solutions are appropriate for injection.
Reported benefits
- Dissolves hard-to-reconstitute peptides
- Improves solubility of hydrophobic peptides
- Enables clear, injectable solutions
Possible side effects
- Injection site stinging if too concentrated
- Irritation with improper dilution
- Not for all peptides
Research
- Solvent selection for peptide solubility (2016): Mildly acidic diluents improved dissolution of hydrophobic peptides compared with neutral aqueous solvents.
Compare Acetic Acid Water
Research and educational reference only. Not medical advice.