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Acetic Acid (dilute, for reconstitution): literature-reported ranges

Some peptides — IGF-1 analogues most notably — do not dissolve or remain stable in neutral water. Published handling protocols use dilute acetic acid to bring them into solution before further dilution.

Read this first

Every figure on this page is a range reported in published literature or in a publicly documented study protocol. It is a record of what researchers used, not a recommendation, a therapeutic protocol, or advice. Peptide Intel Hub is an independent publication, sells nothing, and describes these compounds as in-vitro research reagents only.

Compound at a glance

Class
Dilute acid diluent for poorly water-soluble peptides
Reported half-life
Not applicable — a diluent, not an active compound
Routes used in the literature
Diluent used before dilution into an aqueous buffer
Also written as

What the published studies reported

Each row below describes one body of work. The model and population are part of the figure — a rodent per-kilogram quantity and a human trial quantity are not comparable.

Standard dissolving concentration in handling protocols

Reported quantity
0.1% to 0.6% acetic acid in sterile water (roughly 10–100 mM)
Frequency
Once, at initial dissolution
Study duration
Followed immediately by dilution into the working buffer

0.6% is the figure most commonly cited for IGF-1 family peptides.

Peptide solubility screening practice

Reported quantity
Acidic diluents for basic peptides; dilute ammonium hydroxide for acidic peptides
Frequency
Per preparation
Study duration
Immediate use

Choosing the diluent by the peptide's net charge is standard laboratory practice.

Reconstitution maths

Dissolve in the smallest workable volume of dilute acid, confirm the solution is clear, then dilute into the final buffer. A cloudy solution indicates incomplete dissolution, not a concentration error.

Open the reconstitution calculator

How to read these figures

  • Acidic solutions are irritant and are not a general-purpose substitute for bacteriostatic water.
  • Dilute acetic acid contains no preservative — it does not make a vial multi-entry.
  • Acid-sensitive peptides degrade in these conditions; check the specific peptide's handling data first.

Sources and citations

These are the published records the figures on this page are drawn from. Each one describes what researchers administered, in which model or population, and over what period. Quantities reported in a study are specific to that study's design and are not transferable guidance.

  1. [1]
    Peptide Solubility Guidelines

    GenScript · GenScript Technical Document · 2017 · F1-SFP-PEPTIDE SOLUBILITY GUIDELINES 06132017

    Authoritative technical guideline recommending dilute acetic acid (e.g., 0.1%-10%) as a solubilization solvent for basic/hydrophobic peptides that are poorly soluble in water alone.

    View the record

Search the databases yourself

Read the Acetic Acid (dilute, for reconstitution) research brief

Other supplies compounds

All research protocols

Peptide Intel Hub is an independent publication and has no affiliation, ownership or commercial relationship with the suppliers listed. We sell nothing and take no payments — links are editorial references only.

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© 2026 Peptide Intel Hub · Marbella · Educational research reference · For in-vitro research use only
Independent publication — we sell nothing. Supplier disclosure

Peptide Intel Hub is an independent educational publication. We are not affiliated with, owned by, or the same company as Regena Peptides and Regena.app (regena-peptides.com / regena.app). We do not sell, supply, ship or take payment for any compound. Because readers regularly ask where compounds discussed in published studies can be sourced for laboratory work, we list Regena Peptides and Regena.app as suppliers we have verified and trust — every batch is released with a lot-matched third-party certificate of analysis (HPLC purity and mass-spectrometry identity). Outbound links are marked nofollow/sponsored and are provided to help readers, not to sell.