Quality Assurance, Purity & Analytical Standards

1. High-Performance Liquid Chromatography (RP-HPLC)

RP-HPLC is the benchmark method for quantifying chemical purity in synthetic peptides. Each synthesized peptide batch is injected through high-resolution C18 analytical columns using a trifluoroacetic acid (TFA) / acetonitrile gradient system. Chromatograms must demonstrate a dominant single peak with integrated area purity exceeding 99% before approval.

2. Mass Spectrometry (ESI-MS / MALDI-TOF)

Chromatographic purity alone does not confirm that the amino acid sequence is correct. Electrospray Ionization Mass Spectrometry (ESI-MS) provides exact molecular weight validation, ensuring that all protectant groups have been fully cleaved and that the synthesized chain precisely matches the published chemical formula.

3. Cryogenic Lyophilization & Argon Sealing

Peptides in aqueous solution are inherently susceptible to hydrolysis and deamidation over time. To preserve peak stability, each batch is flash-frozen and lyophilized to an ultra-pure amorphous cake containing less than 3% residual moisture. Vials are flushed with dry inert argon gas before being sealed with pharmaceutical-grade chlorobutyl rubber stoppers and tamper-evident flip-off crimp caps.

4. Batch-Specific Certificates of Analysis (CoA)

We do not use generic or recycled test reports. Every lot produced is assigned a distinct production batch identifier linked directly to its HPLC chromatogram and Mass Spectrum report. Researchers may request lot-specific analytical documentation at any time prior to or following procurement.

To maximize peptide shelf-life and preserve conformational integrity, laboratories should observe standard cold-chain handling:

• Lyophilized (Dry Powder): Store unopened vials at -20°C (stable for 24+ months) or -80°C for extended multi-year preservation. Protect from direct ambient light.

• Equilibration: Before opening, allow the lyophilized vial to equilibrate to room temperature (15–20 minutes) to prevent atmospheric condensation from entering the dry cake.

• Reconstitution: Reconstitute using sterile Bacteriostatic 0.9% Benzyl Alcohol Water. Direct diluent stream against the glass wall rather than directly onto the cake, and swirl gently without vigorous agitation.

• Reconstituted Solution: Store reconstituted solutions at 2°C to 8°C and utilize within 21 to 28 days for optimal experimental potency.