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Browse CatalogEvery batch ships with a third-party COA verifying identity (mass spectrometry), purity (HPLC ≥98%), and endotoxin levels (<1 EU/μg by LAL method).
At LarnaLabs, every product we ship is accompanied by a Certificate of Analysis. Our COAs represent our commitment to transparency, quality, and scientific integrity. This page explains what a COA is, how to obtain yours, and how to interpret the data it contains.
A Certificate of Analysis (COA) is a formal quality assurance document issued for a specific batch of a research compound. It contains the results of analytical tests performed on that batch, confirming the identity, purity, and other relevant properties of the material. A COA links a physical product to its analytical data, providing an auditable record that the compound meets defined quality specifications.
For research peptides, COAs are a critical part of scientific due diligence. Researchers rely on COA data to ensure the compounds used in experiments are correctly identified and meet purity thresholds that ensure experimental validity. Using an uncharacterized compound without COA verification can introduce confounding variables and compromise the integrity of research data.
Each LarnaLabs Certificate of Analysis contains the following information:
Your COA is automatically included with every order. Here is how to access it:
If you need a replacement copy of your COA, use the lookup tool below or contact us directly.
Enter your batch number or order number below to request a replacement COA.
Understanding a COA helps you evaluate compound quality before use in your research. Here is a guide to interpreting the key data fields:
This is the most critical data point for research peptides. Purity is determined by reversed-phase HPLC, which separates the target compound from impurities (truncated sequences, deletion peptides, oxidized forms, etc.) based on hydrophobicity. The purity percentage represents the area of the target compound peak divided by the total peak area, expressed as a percentage. LarnaLabs products are supplied at a minimum of 98% purity unless the product listing specifies otherwise. For sensitive cell-based assays or structure-activity relationship (SAR) studies, higher purity reduces the risk of off-target effects from impurities.
The observed molecular weight (m/z) should match the theoretical molecular weight of the peptide sequence within the instrument’s mass accuracy tolerance (typically +/- 0.5 Da or better). Confirm that the monoisotopic or average molecular weight reported matches the known formula weight of the compound. Multi-charge state ions ([M+H]+, [M+2H]2+, etc.) are normal for larger peptides.
The batch number ties the specific vial you received to the analytical data in the COA. If you are reporting research results, record the batch number so your work is reproducible and the exact material can be referenced.
Confirm the analysis date is consistent with the product being recently manufactured. All LarnaLabs products are tested prior to dispatch.
Yes. Our COAs are batch-specific, meaning the analytical data applies to the specific lot from which your vial was filled. If your vial comes from batch LL-2024-0312, your COA shows the purity and identity data for that exact batch.
LarnaLabs uses accredited independent third-party analytical laboratories for HPLC and mass spectrometry testing. Testing by an independent laboratory ensures objectivity and provides an additional layer of quality verification beyond in-house assessment.
If you believe a product does not conform to its COA specifications, please contact [email protected] immediately with your order number, batch number, and the nature of your concern. We take quality non-conformances seriously and will investigate promptly. Where a verified quality failure is confirmed, we will replace the product or issue a full refund.
For research applications requiring additional characterization data (e.g., NMR, amino acid analysis, endotoxin testing), please contact [email protected] to discuss your specific requirements. Additional testing may be available for certain products or order volumes.
A COA reflects the analytical data at the time of testing. Products that are stored correctly retain their purity for the shelf life indicated on the product listing. A COA does not expire, but product quality may degrade if storage conditions are not maintained. For stored samples, we recommend verifying purity by re-testing if product quality is critical to your experiment and significant time has passed since receipt.
All LarnaLabs products are supplied strictly for in vitro laboratory research use only. They are not intended for human consumption, veterinary use, or any purpose outside of legitimate scientific research. COA documentation confirms chemical identity and purity for research quality assurance purposes and does not constitute regulatory approval of any kind.
