Quality & Testing
Independent third-party analytical testing is commissioned to confirm the identity and purity of the research compounds we source.
🔬
HPLC Purity Analysis
Independent High-Performance Liquid Chromatography reports provide the measured purity for listed compounds.
📋
Certificate of Analysis
Analytical reports are available by email request through support@peptalabs.com and are not downloadable from product pages.
🧬
Analytical Documentation
Product records identify the CAS number, molecular formula, molecular weight, and sequence when applicable.
🛡️
Third-Party Verified
Independent laboratories perform HPLC purity analysis and mass spectrometry identity confirmation for sourced production runs.
Our Testing Process
Pepta Labs is a supplier and reseller, not a manufacturer. Through a cooperative purchasing arrangement, multiple buyers combine volume orders placed directly with manufacturers and fund independent third-party analytical testing for the resulting production runs. Pepta Labs does not manufacture products, operate a production or ISO-certified facility
1
HPLC Analysis
Reverse-phase HPLC measures purity by separating the target compound from detectable synthesis byproducts and degradation artifacts. The reported result is reviewed against the applicable listing threshold.
2
Mass Spectrometry
Mass spectrometry compares the observed molecular mass with the expected mass for the stated compound as an identity check.
3
Documentation Review
The analytical report is reviewed against the compound's published chemical identity, including its name, formula, molecular weight, and sequence where applicable.
4
Receiving Inspection
On receipt, products are inspected for seal integrity, an intact lyophilized cake, expected fill appearance, and labeling that carries the compound name, quantity, and research-use designation.
Reading a Certificate of Analysis
A Certificate of Analysis (COA) records the independent laboratory's HPLC purity and mass spectrometry identity results for a sourced production run. Available fields vary by report, but the analytical information generally includes:
Cooperative Purchasing and COA Naming
Testing is commissioned and funded by the cooperative purchasing group. For that reason, the COA client field names the purchasing group or source rather than Pepta Labs. Supplier-identifying fields are deliberately redacted before the report is shared.
| Field | Description |
|---|
| Product Name | The peptide name and catalog identifier |
| Molecular Formula | Chemical composition of the peptide |
| Molecular Weight | Expected mass in g/mol, confirmed by MS |
| HPLC Purity | Measured percentage purity from chromatography |
| MS Confirmation | Observed mass vs. expected — confirms identity |
| Appearance | White to off-white lyophilized powder |
| Storage Conditions | Recommended temperature for stability |
Request Certificates of Analysis
COA documents are available by email request only. Include the product name and quantity in your message to support@peptalabs.com.
Email COA Request
Our Purity Standards
Compounds are listed against the minimum purity thresholds below. The verified HPLC purity associated with each listed compound is published on its product page.
| Product Category | Minimum HPLC Purity |
|---|
| Peptides (vials) | ≥99.0% |
| Incretin Analogues | ≥99.0% |
| Small Molecules (capsules) | ≥98.0% |
| NAD+ Lyophilized | ≥99.0% |
Storage & Handling
Compounds ship as lyophilized powder at ambient temperature, without cold packs or insulated packaging. Dry powder is substantially more thermally stable than reconstituted solution, and short-term ambient exposure in transit is not expected to meaningfully affect purity.
On arrival, refrigerate sealed vials at 2–8°C or store at -20°C for long-term storage. Keep them protected from light and moisture.