Quality & Testing
Every peptide that leaves our facility has been independently verified for identity, purity, and sterility. We believe transparency in testing is non-negotiable.
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99%+ HPLC Purity
Every batch exceeds 99% purity as verified by High-Performance Liquid Chromatography analysis.
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Certificate of Analysis
Batch-specific COA documents available upon request via support@peptalabs.com.
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ISO-Compliant Facility
Manufactured in facilities adhering to ISO 9001 standards with controlled environments.
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Third-Party Verified
Independent laboratories perform all analytical testing — never self-tested or self-reported.
Our Testing Process
Every batch of peptide undergoes a multi-stage analytical verification process before it is released for sale. This process is designed to confirm molecular identity, quantify purity, and screen for biological contaminants.
1
HPLC Analysis
Reverse-phase HPLC quantifies peptide purity by separating the target compound from any synthesis byproducts or degradation artifacts. We require ≥99% for release.
2
Mass Spectrometry
ESI-MS or MALDI-TOF confirms molecular weight matches the expected peptide structure. This verifies identity at the molecular level — the peptide is exactly what it claims to be.
3
Endotoxin Screening
LAL (Limulus Amebocyte Lysate) testing screens for bacterial endotoxins. All products must fall below <1 EU/mg to pass.
4
Visual & Lyophilization QC
Final inspection confirms proper lyophilization (freeze-drying), correct fill weight, intact seal, and proper labeling before shipping.
Reading a Certificate of Analysis
Each Certificate of Analysis (COA) accompanies a specific lot of product and documents the results of independent third-party testing. Here is what you will find on every COA we provide:
| Field | Description |
|---|
| Product Name | The peptide name and catalog identifier |
| Lot/Batch Number | Unique identifier for the production batch |
| Molecular Formula | Chemical composition of the peptide |
| Molecular Weight | Expected mass in g/mol, confirmed by MS |
| HPLC Purity | Percentage purity from chromatography (≥99%) |
| MS Confirmation | Observed mass vs. expected — confirms identity |
| Appearance | White to off-white lyophilized powder |
| Endotoxin Level | LAL result, must be <1 EU/mg |
| Storage Conditions | Recommended temperature for stability |
Download Certificates of Analysis
COA documents are available upon request. Email support@peptalabs.com with your product name and batch number.
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Our Purity Standards
We maintain strict minimum purity thresholds across all product categories. Batches that fail to meet these specifications are rejected and never shipped to customers.
| Product Category | Minimum HPLC Purity |
|---|
| Peptides (vials) | ≥99.0% |
| Incretin Analogues | ≥98.5% |
| Small Molecules (capsules) | ≥98.0% |
| NAD+ Lyophilized | ≥99.0% |
Storage & Handling
Proper storage is essential to maintaining peptide integrity. All lyophilized (freeze-dried) compounds should be stored at -20°C for long-term stability. Keep sealed vials protected from light and moisture. Avoid repeated freeze-thaw cycles, as these can degrade peptide bonds.
Products ship with cold packs and insulated packaging to maintain temperature during transit. All vials are sealed under inert gas to prevent oxidative degradation.