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HPLC (High-Performance Liquid Chromatography) Purity percentage. Proportion of powder that is target peptide vs impurities ≥98% for research-grade; 95–97.9% usable with dose adjustment Determines active dose per mg and reproducib…
HPLC Purity 95–98% ≥98.5% 10% Below 95%, impurities interfere with receptor studies Molecular Weight (MS) ±1 Da from expected ±0.5 Da from expected ±2 Da or multiple peaks Variance >2 Da suggests synthesis error or degradation En…
HPLC Purity (%) Proportion of target peptide vs impurities ≥95% for research use, ≥98% for quantitative assays 3% HPLC purity alone isn't enough. You need MS confirmation to prove the primary peak is the correct compound. A 97% p…
HPLC (Purity) Percentage of target peptide vs impurities ≥95% for research-grade Peptide identity, sequence correctness 2% Mass Spectrometry Molecular weight matches theoretical structure ±1 Da from calculated MW Amino ac
Sterility 'No growth detected' or 'Complies with USP ' Any colony count, 'growth observed', or missing data USP . 14-day incubation, aerobic and anaerobic media Bacterial/fungal contamination renders peptide unusable and creates …
HPLC Purity Proportion of sample that is target peptide vs impurities ≥98% for research-grade Verifies synthesis quality and homogeneity. Low purity means you're dosing with unknown compounds Purity <95%, multiple large peaks on …