AOD is an ultra-high-purity research formulation designed for advanced laboratory applications. One unique characteristic of AOD is its natural tendency to thicken or gel over time, even when mixed with acetic acid.
This behavior is completely normal and does not affect the peptide’s stability, integrity, or suitability for research. The material remains fully usable even when thick or viscous.

Why AOD Gels

Because AOD is a highly concentrated peptide, its molecules can gradually self-associate through hydrogen bonding and hydrophobic interactions, forming a gel-like consistency. This process:

• Occurs in all batches, regardless of storage conditions or solvent used.

• Does not reduce potency or alter functionality.

Solubility & Handling Information

For research use, AOD may be reconstituted using an appropriate solvent system.
Acidic environments — such as those achieved with acetic acid — are known to help maintain peptide solubility and stability, while neutral solutions can promote aggregation or thickening.
Researchers should determine the optimal solvent composition and handling conditions in accordance with their laboratory protocol and intended study design.

If Gelling Occurs

In some cases, creating a slightly more acidic environment may help reduce viscosity.
Even if the product remains thick, it is still fully effective for research use and does not indicate degradation.

Product Quality Notice

AOD’s gelling tendency is a natural result of its exceptional purity and high concentration, not a defect.
Because this behavior is inherent to the formulation, refunds or exchanges are not available.

Research Basis

Scientific literature supports that peptide aggregation and gelation are common phenomena in concentrated, high-purity peptide solutions and are influenced by pH and solvent environment:

• Wang W., Int J Pharm. 2000;203(1–2):1–60 — Acidic conditions help prevent aggregation and maintain peptide structure.

• Manning MC et al., Pharm Res. 2010;27(4):544–575 — High peptide concentration increases intermolecular interactions leading to gelation.

• Mezzenga R et al., Adv Mater. 2013;25(41):5790–5804 — Gelation results from normal peptide self-assembly, not degradation.

• Sigma-Aldrich Peptide Handling Guide (2022) — Recommends dilute acetic acid when neutral solvents cause cloudiness or incomplete dissolution.

Together, these findings confirm that AOD’s gelling behavior is natural, expected, and consistent with peptide chemistry, not a sign of product failure.