Research integrity depends on compound quality. Every peptide sold through TrueCanPeptides is subjected to a multi-stage quality verification process before shipment. This page outlines our testing standards, documentation practices, and what researchers should expect from each order.
Our Purity Standard
TrueCanPeptides maintains a minimum purity threshold of ≥98% for all compounds in our catalog. Purity is verified per batch using two complementary analytical methods:
- High-Performance Liquid Chromatography (HPLC) — quantifies compound purity by separating and measuring each component in the sample. HPLC produces a chromatogram showing the relative proportion of the target compound versus any impurities present.
- Mass Spectrometry (MS) — confirms molecular identity by measuring the mass-to-charge ratio of ionized compounds, verifying the compound is what it claims to be at the molecular level.
Used together, HPLC and MS provide high confidence in both purity percentage and compound identity — the two most critical quality dimensions for any research application.
Third-Party Testing
All TrueCanPeptides compounds are verified by independent third-party analytical laboratories — not tested in-house by the supplier. Third-party testing eliminates supplier bias and provides an independent chain of evidence that each batch meets stated specifications before it reaches a researcher.
In-house testing by a supplier creates a conflict of interest: the entity profiting from a sale is also the one certifying the product meets quality standards. Third-party verification breaks that chain. Our testing partners have no commercial relationship with the outcome of the result.
Certificate of Analysis (COA)
A Certificate of Analysis (COA) is the primary documentation artifact produced by the testing laboratory. Each COA records:
- Compound name and molecular formula
- Batch or lot number
- HPLC purity percentage
- Mass spectrometry confirmation result
- Testing laboratory name and date
- Pass/fail status against stated specifications
COAs are available for every product in our catalog. Researchers requiring documentation for institutional compliance purposes, laboratory records, or grant reporting can request the COA for any specific batch through our contact page.
Why Purity Matters in Peptide Research
Research reproducibility depends on consistent, well-characterized compounds. A peptide with 85% purity contains up to 15% unknown impurities — which may include related peptides, synthesis byproducts, residual solvents, or degradation products. These impurities can influence experimental outcomes, confound data interpretation, and make results difficult to reproduce across different batches or laboratories.
For in vitro cell studies, impurities may exhibit independent biological activity — potentially producing effects attributed to the target compound. For researchers publishing findings or comparing results to peer-reviewed literature, starting with a well-characterized compound at ≥98% purity is the baseline standard.
Storage and Stability Considerations
Purity at the time of manufacture must be maintained through proper handling. All TrueCanPeptides compounds are supplied in lyophilized (freeze-dried) form, which maximizes stability during shipping and storage. Key storage principles for maintaining compound integrity:
- Lyophilized peptides: Store at −20°C for long-term storage; −80°C for extended periods exceeding 12 months. Keep desiccated and protected from light.
- Avoid repeated freeze-thaw cycles: Each cycle can introduce degradation. Reconstitute only the volume needed for immediate use.
- Reconstituted peptides: Use sterile diluent appropriate for the compound (bacteriostatic water or acetic acid solution as indicated). Use within 30 days when stored at 4°C, or freeze aliquots immediately.
- Handling: Allow sealed vials to equilibrate to room temperature before opening to prevent condensation contact with the lyophilized material.
See our complete peptide storage guide and reconstitution guide for detailed protocols.
How Our Quality Standards Support Your Research
Research validity depends on compound consistency across experiments. When you source from a supplier with documented, third-party-verified purity at ≥98% HPLC, you’re establishing a known baseline for your experimental starting material. This supports reproducibility, data integrity, and confidence when comparing results to peer-reviewed literature.
Every TrueCanPeptides compound ships in lyophilized (freeze-dried) form — the stable, long-shelf-life format that preserves integrity throughout transit and storage. Our compounds are sealed, labelled with batch references, and matched to COA documentation before dispatch.
For complete guidance on receiving, storing, and reconstituting lyophilized research peptides, see our dedicated Lyophilized Peptides Guide. For reconstitution protocols, see the Peptide Reconstitution Guide.
Frequently Asked Questions — Peptide Purity
What does ≥98% purity mean?
It means that at least 98% of the material in the vial is the stated compound, as measured by HPLC. The remaining ≤2% may consist of trace impurities — typically related peptides or synthesis byproducts — at levels considered acceptable for research-grade compounds.
How do I obtain a COA for a specific batch?
Contact us via the contact page with your order number and the compound name. We will provide the COA document for your specific batch.
Is HPLC the only valid method for purity testing?
HPLC is the industry standard for peptide purity quantification and is the method used by virtually all reputable research peptide suppliers. When paired with mass spectrometry for identity confirmation, it provides the most complete picture of compound quality available at this scale.
Browse Our Research Compound Catalogue
Every compound in our research catalogue is held to these purity standards. Third-party tested, COA-backed, and supplied for qualified laboratory research in Canada.
All products are for research and laboratory use only. Not intended to diagnose, treat, cure, or prevent any disease. Not for human consumption.