Acetic Acid (CH₃COOH) as supplied by ProSource Labs is a dilute aqueous solution packaged for laboratory research use. Acetic acid is a weak organic carboxylic acid (pKa 4.76) and, in dilute aqueous form, is the standard low-pH diluent used specifically to solubilize hydrophobic peptides that resist dissolution in neutral aqueous buffers. This is a liquid reagent — it is not a peptide, not a lyophilized powder, and is stored at room temperature rather than frozen.

ProSource Labs supplies Acetic Acid in the following available vial sizes for research purchase: 5mL. Product SKU references: AA-5mL.

• Weak organic acid; CH₃COOH, MW 60.05 g/mol
• Miscible with water in all proportions
• Standard low-pH solubilization diluent for hydrophobic peptides in preclinical research
• Store in acid-compatible sealed containers away from strong bases

Each vial is sealed under sterile conditions in the source manufacturer's cGMP facility (for pharmaceutical-grade solutions like Hospira Bacteriostatic Water) or in a validated laboratory environment for laboratory-grade reagents. Vials are visually inspected for particulate matter and seal integrity before release.

Storage: Store at room temperature (15–30°C), tightly capped and upright, away from strong bases, oxidizing agents, and direct sunlight. Do NOT freeze — freezing can compromise vial seal integrity and shift the equilibrium concentration.

Because Acetic Acid is a liquid, freezing is not appropriate — freeze-thaw cycles can compromise the vial's seal, alter the concentration through water-ice expansion damage, and (for preserved solutions) can affect preservative distribution. Store the sealed vial upright.

All laboratory handling should follow the receiving institution's standard operating procedures for sterile reagents. Once a vial's rubber septum has been punctured, the contents should be treated per the corresponding manufacturer's product monograph.

Because Acetic Acid is a liquid reagent rather than a synthetic peptide, HPLC purity testing is not the relevant analytical method. Quality documentation for this product covers the manufacturer's certificate of sterility, endotoxin testing, fill-volume verification, and (for preserved products) preservative concentration analysis.

For pharmaceutical-grade products supplied through ProSource Labs (such as Hospira Bacteriostatic Water for Injection), the underlying manufacturer's FDA-approved product monograph is the authoritative reference for composition, storage, and in-use timelines. Request the source documentation from customer support after purchase if required for your institution's incoming QA workflow.

Dilute acetic acid solutions are commonly referenced in peer-reviewed peptide chemistry protocols as a solubilization diluent for hydrophobic long-chain research peptides — including GLP-1 class analogs, Retatrutide-class triple-agonist peptides, Tirzepatide-class dual agonists, and other peptides bearing hydrophobic fatty-acid side chains that limit neutral-buffer solubility. The mild acidic environment (typically pH ~3) helps disrupt hydrophobic aggregation and drives the peptide into solution. Once dissolved, researchers typically titrate to the working pH required by their downstream assay.

Acetic Acid vials ship in tamper-evident, moisture-resistant, cold-chain-friendly outer packaging from our Southern California distribution facility for fast US domestic delivery — typically 2-4 business days coast-to-coast, with expedited options available at checkout.

Every Acetic Acid shipment is discreet — the outer packaging carries no product-specific branding or direct reference to the compound name inside, protecting researcher privacy. Tracking numbers are emailed automatically. For institutional or high-volume orders, dedicated wholesale pricing is available through the wholesale portal.