Source comparison
How to Read MK-677 COA: Testing Methods Comparison
HPLC (High-Performance Liquid Chromatography) Peptide purity as % of total sample ≥98.0% Degradation, incomplete synthesis, or contamination with synthesis byproducts Mass Spectrometry (MS) Molecular weight to confirm peptide identity 624.77 g/mol ±0.5 Wrong p
This comparison does not assign a generated winner or score.
- HPLC (High-Performance Liquid Chromatography)
- Peptide purity as % of total sample
- ≥98.0%
- Degradation, incomplete synthesis, or contamination with synthesis byproducts
- Mass Spectrometry (MS)
- Molecular weight to confirm peptide identity
- 624.77 g/mol ±0.5
- Wrong peptide shipped, or structural degradation altering molecular weight
- LAL Endotoxin Test
- Bacterial endotoxin concentration
- <1.0 EU/mg
- Bacterial contamination during synthesis or lyophilization process
- Sterility Test (14-day culture)
- Presence of viable bacteria, yeast, or mold
- No growth detected
- Microbial contamination. Peptide unsafe for reconstitution or use