Research Peptides
with COA
Every compound at Blackwell BioLabs ships with a batch-specific Certificate of Analysis from an independent, accredited third-party laboratory. Not a self-certification. Not a shared COA. One COA, one batch, every time.
Why a Certificate of Analysis Matters
Identity Verification
Mass spectrometry confirms the compound is what it claims to be — not an analog, not a truncated sequence, not a substitute. In peptide research, molecular identity is the foundation of reproducible results.
Purity Confirmation
A purity percentage from HPLC tells you how much of what you received is actually the target compound. Impurities don't just dilute your dose — they can introduce confounding variables that invalidate experimental data.
Endotoxin Clearance
Bacterial endotoxins can be present even in chemically pure samples. Our endotoxin testing ensures that biological responses observed in research aren't artifacts of contamination.
Batch-Level Traceability
A batch-specific COA links every test result to the exact production lot you received. If you need to reproduce an experiment, you can reference the exact batch parameters. Generic or shared COAs don't provide this.
Our Third-Party Testing Process
We use ISO 17025-accredited independent laboratories for all analytical testing. We never self-certify. Every method is chosen to address the specific failure modes relevant to synthetic peptide research compounds.
HPLC Purity Analysis
HPLCHigh-Performance Liquid Chromatography separates the components in a sample and measures the relative peak area of the target compound against known reference standards. This gives us the purity percentage you see on every COA — expressed as a percentage of the target compound relative to total peak area.
Confirms purity percentage (e.g., ≥99%). Detects impurities, degradation products, and synthesis byproducts.
Mass Spectrometry
MSMass Spectrometry (typically LC-MS or ESI-MS) confirms the molecular identity of the compound by measuring its exact molecular weight and fragmentation pattern. A match with the theoretical molecular weight of the target peptide confirms it is what it claims to be — not a substitute or analog.
Confirms molecular identity. Catches substitution, truncation errors, and contaminants with different masses.
Endotoxin Testing
LAL/rFCEndotoxins (lipopolysaccharides from gram-negative bacteria) can be present even in chemically pure samples due to contamination during synthesis or lyophilization. We test using either Limulus Amebocyte Lysate (LAL) or recombinant Factor C (rFC) assays, which detect bacterial endotoxins at the EU/mg level.
Confirms absence of bacterial endotoxin contamination. Critical for any injectable research application.
Visual Inspection & Weight Verification
QCEvery vial is inspected for visual anomalies (color, consistency, foreign particles) and weighed against specification tolerances. Lyophilized peptides should present as a white to off-white powder — deviations are flagged and not released.
Final QC gate before release. Ensures label claim (mg content) matches actual content within ±5%.
How to Read a Peptide COA
A Certificate of Analysis contains several fields. Here is what each one means and what you should verify when you receive your COA.
⚠️ Red Flag to Watch For
If a COA does not name the third-party laboratory, or if the same COA document is used across multiple batches, it is likely a self-certification or a fabricated document. All Blackwell BioLabs COAs include the testing lab name, accreditation details, and are batch-specific.
All Compounds — COA Available on Every Product Page
Every product in our catalog ships with a downloadable batch-specific COA. Click any compound to view the product page, where the current COA is available for download.
BPC-157
TB-500
GHK-Cu
Selank
Semax
Retatrutide
Cerebrolysin
KPV
MOTS-c
SS-31
Dihexa
NAD+
Bacteriostatic Water
All products on this site are intended exclusively for laboratory research and analytical use. They are not intended for human or veterinary use, and are not approved by any regulatory agency for diagnostic, therapeutic, or preventive purposes. Not for human consumption.