Quality Assurance
Every order ships with a batch-specific Certificate of Analysis. We do not issue self-certified CoAs or rely on manufacturer-supplied data — every certificate is produced by an independent, ISO-accredited third-party laboratory.
Compound name and CAS registry number
Batch reference number (unique per production run)
HPLC purity percentage with full chromatogram
Mass spectrometry molecular weight confirmation
Amino acid analysis composition data
Endotoxin testing result (LAL assay)
Testing laboratory name and ISO accreditation details
Date of analysis and analyst reference
Storage and handling recommendations
Every batch undergoes four independent analytical tests before release. No compound leaves our facility without passing all four stages.
High-Performance Liquid Chromatography
Separates and quantifies each component in the sample to determine purity percentage. Our minimum accepted threshold is 98%, with most compounds exceeding 99%. The chromatogram is included in every CoA.
Confirms purity to ≥98% (typically 99%+)
Electrospray Ionisation Mass Spectrometry (ESI-MS)
Verifies the molecular weight of the compound matches the expected value for the target peptide. This confirms identity — that the compound is what it claims to be, not a substitute or degradation product.
Confirms molecular identity and weight
Quantitative Amino Acid Composition
Breaks the peptide into individual amino acids and measures their ratios. This confirms the correct sequence and stoichiometry — that the peptide was synthesised accurately.
Confirms correct sequence and composition
Limulus Amebocyte Lysate (LAL) Assay
Detects bacterial endotoxins (lipopolysaccharides) that can contaminate peptide preparations. All Premio Peptides compounds test below detectable limits.
Below detectable limits on all batches
Many peptide suppliers issue self-certified certificates of analysis — documents generated in-house using the manufacturer’s own data. These carry an inherent conflict of interest: the party selling the compound is also the party certifying its quality.
Premio Peptides takes a different approach. Every batch we stock is submitted to an independent, ISO-accredited analytical laboratory with no commercial interest in the result. The laboratory performs the full testing protocol described above and issues the certificate directly. We cannot influence, edit, or selectively publish results — if a batch fails any stage, it is rejected outright and never enters our supply chain.
This approach costs more and takes longer than self-certification. We believe it is the only approach consistent with supplying research-grade compounds to institutions that depend on data integrity.
Batch-specific certificates are generated for each production run. Request a CoA for any compound currently in stock — we’ll provide it within one business day.
Request a sample CoA for any compound currently in stock. We’ll email it to you within one business day.