Every batch tested.
Every COA on request.
Research integrity starts with verified purity. Independent laboratory. No exceptions.
Synthesis
Peptides synthesised under cGMP conditions using Fmoc solid-phase synthesis (SPPS). Environmental controls and cleanroom standards maintained throughout production.
HPLC Analysis
High-Performance Liquid Chromatography separates and quantifies peptide content against reference standards. Minimum threshold: +99% purity for simple sequences, +98% for complex structures.
Mass Spectrometry
ESI-MS or MALDI-TOF confirms molecular identity and detects any co-eluting impurities. Each batch receives a full mass spectrum trace archived with the COA.
COA Issuance
Certificate of Analysis issued by the independent third-party laboratory, not by Stackpure. Includes batch number, test date, measured purity, identity confirmation, and full laboratory details.
Sample COA Format
Every Certificate of Analysis follows this format. Yours will show your specific product and batch.
Sample only. Product name and batch number shown are illustrative, not a real order.
Testing Standards
Why This Matters
- In-house purity claims only
- No COA links on product pages
- Batch testing: selective
- Mass spectrometry: not standard
- COA on request: often unavailable
- Independent third-party laboratory
- COA available for every batch
- 100% of batches tested
- HPLC + mass spectrometry standard
- COA on request: within 24 hours
Your specific batch's Certificate of Analysis is available on request with your order and batch number, usually within 24 hours. See the sample format above for exactly what it contains.