Certificates of Analysis
Every PepBros peptide comes with a Certificate of Analysis from independent testing laboratories, providing complete transparency about purity and identity.
Our Testing Process
HPLC Analysis
High-Performance Liquid Chromatography confirms purity levels ≥99% for all peptides
- Purity percentage verification
- Impurity identification
- Quantitative analysis
Mass Spectrometry
MS analysis verifies molecular identity, structure, and amino acid sequence accuracy
- Molecular weight confirmation
- Structural verification
- Sequence analysis
Sterility Testing
Endotoxin and microbial testing ensures product safety for research applications
- Endotoxin levels (LAL test)
- Microbial contamination
- Sterility assurance
What's Included in Every COA
Product Identification
Name, lot number, and manufacturing date
Purity Analysis
HPLC purity percentage (≥99%)
Molecular Weight
Mass spectrometry verification
Amino Acid Sequence
Structural confirmation
Appearance & Solubility
Physical characteristics
Testing Laboratory
Independent third-party verification
Sample Certificates
View example COAs from recent batches
Semaglutide 5mg
Lot: SEM-2024-001 • Purity: 99.2%
BPC-157 10mg
Lot: BPC-2024-015 • Purity: 99.5%
Tirzepatide 10mg
Lot: TRZ-2024-008 • Purity: 99.1%
GHK-Cu 50mg
Lot: GHK-2024-022 • Purity: 99.4%