Every order from Aureum Peptides includes a Certificate of Analysis (COA) — a document that provides comprehensive analytical data about your specific batch. Understanding how to interpret this document helps researchers verify product quality and maintain proper laboratory documentation.

What is a Certificate of Analysis?

A COA is a formal document issued by a quality control laboratory that certifies the analytical results for a specific batch of product. Each COA is lot-specific, meaning the data corresponds to the exact batch you received — not a generic or representative sample.

Key Sections of a Peptide COA

1. Product Identification

The header section includes the peptide name, catalog number, lot/batch number, and manufacturing date. The batch number on your COA should match the label on your vial — this confirms traceability from synthesis to delivery.

2. HPLC Purity

The HPLC (High-Performance Liquid Chromatography) section is typically the most important part of a COA. It includes:

• Purity percentage: The target compound as a percentage of total peptide content (we require ≥99%)
• Chromatogram: A graphical trace showing the separation of peptide components
• Retention time: The time at which the target peptide elutes from the column
• Method details: Column type, mobile phase, gradient conditions

3. Mass Spectrometry (MS)

Mass spectrometry confirms the molecular identity of the peptide:

• Observed molecular weight: The measured mass from the instrument
• Theoretical molecular weight: The expected mass based on the amino acid sequence
• Mass accuracy: The agreement between observed and theoretical (typically within ±0.1%)

A match between observed and theoretical mass confirms that the correct peptide was synthesized without truncation or modification errors.

4. Endotoxin Testing

The Limulus Amebocyte Lysate (LAL) assay measures bacterial endotoxin levels. This is critical for researchers using peptides in cell culture or in vivo models. Results are reported in Endotoxin Units per milligram (EU/mg), with passing criteria typically <1 EU/mg.

5. Sterility

Microbiological testing confirms the absence of bacterial and fungal contamination. This section reports pass/fail status for standard sterility assays.

6. Additional Information

Depending on the peptide, the COA may also include:

• Amino acid analysis results
• Peptide content (net peptide weight vs. total weight including counterions and moisture)
• Appearance description (white/off-white lyophilized powder)
• Recommended storage conditions

Why COAs Matter

In regulated research environments, COAs serve as quality documentation that supports:

• Good Laboratory Practice (GLP) compliance
• Experimental reproducibility (matching batches to results)
• Institutional review board (IRB) documentation requirements
• Publication-ready methods sections (citing analytical verification)

At Aureum Peptides, we believe transparency isn’t optional — it’s the standard. Every batch, every product, every time.

FOR LABORATORY RESEARCH USE ONLY. Not for human consumption.

In peptide research, purity isn’t just a number on a certificate — it’s the foundation of reliable, reproducible results. When researchers invest time and resources into experimental protocols, the integrity of their reagents directly impacts the quality of their data.

What Does Peptide Purity Mean?

Peptide purity refers to the percentage of the target peptide in a given sample relative to total peptide content. A purity level of 99%+ means that less than 1% of the sample consists of truncated sequences, deletion peptides, or other synthesis byproducts.

High-Performance Liquid Chromatography (HPLC) is the gold standard for measuring peptide purity. The technique separates peptide components based on their hydrophobicity, producing a chromatogram that reveals the relative abundance of each species in the sample.

Why Does Purity Matter in Research?

Impurities in peptide preparations can introduce confounding variables into experimental systems. Even small amounts of truncated peptides or synthesis byproducts can:

• Compete with the target peptide for receptor binding sites
• Trigger non-specific cellular responses that mask the true activity of the compound
• Interfere with mass spectrometry and other analytical measurements
• Reduce the effective concentration of active peptide in dose-response studies

For these reasons, premium research-grade peptides verified to ≥99% purity through independent third-party HPLC analysis represent the standard for rigorous scientific investigation.

How Aureum Ensures Quality

Every batch of Aureum peptides undergoes a multi-stage quality verification process:

1. HPLC Purity Analysis — Independent third-party verification confirming ≥99% purity
2. Mass Spectrometry — Molecular identity confirmation via ESI-MS
3. Endotoxin Testing — LAL assay ensuring safe levels for cell culture applications
4. Sterility Verification — Microbiological testing for contamination-free preparations

A comprehensive Certificate of Analysis (COA) documenting all analytical results is included with every order, providing researchers with the documentation needed for their quality records.

FOR LABORATORY RESEARCH USE ONLY. Not for human consumption. Not approved to diagnose, treat, cure, or prevent any condition.

Proper storage and reconstitution practices are essential for maintaining peptide integrity throughout your research. This guide covers best practices for handling lyophilized peptides from receipt through experimental use.

Lyophilized Peptide Storage

Lyophilized (freeze-dried) peptides offer the greatest stability and longest shelf life. Upon receipt, store lyophilized peptides at -20°C in a freezer dedicated to research reagents. Under these conditions, most peptides maintain stability for 24 months or longer.

Key storage guidelines:

• Store at -20°C for long-term stability (up to 24 months)
• Keep vials sealed until ready for reconstitution
• Allow vials to reach room temperature before opening to prevent moisture condensation
• Store away from direct light, which can degrade certain peptide sequences
• Maintain a consistent freezer temperature — avoid placement near the door

Reconstitution Best Practices

When you’re ready to use a peptide, proper reconstitution ensures the compound maintains its activity:

1. Choose your diluent: Bacteriostatic water (BAC water) is recommended for most peptides. Some acidic peptides may require 0.6% acetic acid for proper dissolution.
2. Calculate your concentration: Use a reconstitution calculator to determine the volume of diluent needed for your target concentration. Our Research Calculator can help.
3. Add diluent slowly: Direct the liquid along the inside wall of the vial. Do not inject directly onto the lyophilized powder.
4. Swirl gently: Allow the peptide to dissolve naturally. Do NOT shake, vortex, or agitate vigorously — this can cause peptide degradation and foaming.
5. Allow full dissolution: Some peptides may take 5-10 minutes to fully dissolve. A clear solution indicates complete reconstitution.

Reconstituted Peptide Storage

Once reconstituted, peptide solutions have a shorter shelf life:

• Refrigerate at 2-8°C and use within 30 days
• Aliquot into single-use portions to avoid repeated freeze-thaw cycles
• If aliquoting for longer storage, flash-freeze aliquots and store at -20°C
• Never refreeze a thawed aliquot — use it or discard it

Common Mistakes to Avoid

• ❌ Shaking or vortexing reconstituted peptides
• ❌ Repeated freeze-thaw cycles (degrade peptide bonds)
• ❌ Using tap water or non-sterile diluents
• ❌ Storing reconstituted solutions at room temperature
• ❌ Opening cold vials before equilibrating to room temperature

FOR LABORATORY RESEARCH USE ONLY. Not for human consumption.

When purchasing research peptides, purity is the single most important factor. But what does 99%+ purity actually mean, and why does it matter for your research?

What is Peptide Purity?

Peptide purity refers to the percentage of the target peptide present in a sample versus impurities. These impurities can include truncated sequences, deletion sequences, and other synthesis byproducts.

How is Purity Measured?

The gold standard for peptide purity analysis is High-Performance Liquid Chromatography (HPLC). This technique separates the components of a sample and measures the relative abundance of each. Mass spectrometry (MS) is used alongside HPLC to confirm molecular identity.

Why 99%+ Matters

For research applications, higher purity means more reliable and reproducible results. Impurities can interfere with binding assays, cell culture experiments, and other sensitive research protocols.

At Aureum Peptides, every batch undergoes rigorous third-party HPLC analysis. Our Certificate of Analysis (COA) provides complete purity verification for each product.

For research purposes only. Not for human consumption.

Proper reconstitution is essential for maintaining peptide integrity in your research. This guide covers best practices for reconstituting lyophilized peptides.

Choosing Your Diluent

Bacteriostatic water is the most common diluent for peptide reconstitution. It contains 0.9% benzyl alcohol as a preservative, which helps prevent bacterial contamination during multiple uses.

Step-by-Step Reconstitution

1. Allow the peptide vial to reach room temperature.
2. Using a sterile syringe, draw the desired volume of diluent.
3. Inject the diluent slowly along the inner wall of the vial.
4. Gently swirl — do not shake — until fully dissolved.
5. Store reconstituted peptides at 2-8°C.

Storage Guidelines

Lyophilized peptides should be stored at -20°C for long-term storage. Once reconstituted, store at 2-8°C and use within 30 days for optimal stability.

Use our Research Calculator to determine exact concentrations and draw volumes for your experiments.

For research purposes only. Not for human consumption.

BPC-157 (Body Protection Compound-157) is a synthetic pentadecapeptide derived from human gastric juice. It has become one of the most extensively studied peptides in research settings worldwide.

Molecular Profile

BPC-157 consists of 15 amino acids with the sequence Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val. Its molecular weight is approximately 1419.53 Da, and it demonstrates remarkable stability in both acidic and basic environments.

Research Applications

Published research on BPC-157 spans multiple areas including wound healing mechanisms, gastrointestinal function, musculoskeletal recovery pathways, and neuroprotective effects. Over 100 peer-reviewed studies have been published examining its mechanisms of action.

Key Research Findings

Studies have demonstrated that BPC-157 interacts with the nitric oxide (NO) system, promotes angiogenesis, and modulates growth factor expression including VEGF and EGF pathways. These mechanisms make it a valuable tool for studying tissue repair processes.

All Aureum BPC-157 products are verified at 99%+ purity through independent HPLC analysis with COA documentation included.

For research purposes only. Not for human consumption.